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
  26 #include "qemu/osdep.h"
  27 #include "hw/pci/pci.h"
  28 #include "hw/qdev-properties.h"
  29 #include "migration/vmstate.h"
  30 #include "qemu/module.h"
  31 #include "hw/isa/isa.h"
  32 #include "sysemu/dma.h"
  33 #include "sysemu/reset.h"
  34
  35 #include "hw/ide/pci.h"
  36 #include "trace.h"
  37
  38 /* CMD646 specific */
  39 #define CFR             0x50
  40 #define   CFR_INTR_CH0  0x04
  41 #define CNTRL           0x51
  42 #define   CNTRL_EN_CH0  0x04
  43 #define   CNTRL_EN_CH1  0x08
  44 #define ARTTIM23        0x57
  45 #define    ARTTIM23_INTR_CH1    0x10
  46 #define MRDMODE         0x71
  47 #define   MRDMODE_INTR_CH0      0x04
  48 #define   MRDMODE_INTR_CH1      0x08
  49 #define   MRDMODE_BLK_CH0       0x10
  50 #define   MRDMODE_BLK_CH1       0x20
  51 #define UDIDETCR0       0x73
  52 #define UDIDETCR1       0x7B
  53
  54 static void cmd646_update_irq(PCIDevice *pd);
  55
  56 static void cmd646_update_dma_interrupts(PCIDevice *pd)
  57 {
  58     /* Sync DMA interrupt status from UDMA interrupt status */
  59     if (pd->config[MRDMODE] & MRDMODE_INTR_CH0) {
  60         pd->config[CFR] |= CFR_INTR_CH0;
  61     } else {
  62         pd->config[CFR] &= ~CFR_INTR_CH0;
  63     }
  64
  65     if (pd->config[MRDMODE] & MRDMODE_INTR_CH1) {
  66         pd->config[ARTTIM23] |= ARTTIM23_INTR_CH1;
  67     } else {
  68         pd->config[ARTTIM23] &= ~ARTTIM23_INTR_CH1;
  69     }
  70 }
  71
  72 static void cmd646_update_udma_interrupts(PCIDevice *pd)
  73 {
  74     /* Sync UDMA interrupt status from DMA interrupt status */
  75     if (pd->config[CFR] & CFR_INTR_CH0) {
  76         pd->config[MRDMODE] |= MRDMODE_INTR_CH0;
  77     } else {
  78         pd->config[MRDMODE] &= ~MRDMODE_INTR_CH0;
  79     }
  80
  81     if (pd->config[ARTTIM23] & ARTTIM23_INTR_CH1) {
  82         pd->config[MRDMODE] |= MRDMODE_INTR_CH1;
  83     } else {
  84         pd->config[MRDMODE] &= ~MRDMODE_INTR_CH1;
  85     }
  86 }
  87
  88 static uint64_t bmdma_read(void *opaque, hwaddr addr,
  89                            unsigned size)
  90 {
  91     BMDMAState *bm = opaque;
  92     PCIDevice *pci_dev = PCI_DEVICE(bm->pci_dev);
  93     uint32_t val;
  94
  95     if (size != 1) {
  96         return ((uint64_t)1 << (size * 8)) - 1;
  97     }
  98
  99     switch(addr & 3) {
 100     case 0:
 101         val = bm->cmd;
 102         break;
 103     case 1:
 104         val = pci_dev->config[MRDMODE];
 105         break;
 106     case 2:
 107         val = bm->status;
 108         break;
 109     case 3:
 110         if (bm == &bm->pci_dev->bmdma[0]) {
 111             val = pci_dev->config[UDIDETCR0];
 112         } else {
 113             val = pci_dev->config[UDIDETCR1];
 114         }
 115         break;
 116     default:
 117         val = 0xff;
 118         break;
 119     }
 120
 121     trace_bmdma_read_cmd646(addr, val);
 122     return val;
 123 }
 124
 125 static void bmdma_write(void *opaque, hwaddr addr,
 126                         uint64_t val, unsigned size)
 127 {
 128     BMDMAState *bm = opaque;
 129     PCIDevice *pci_dev = PCI_DEVICE(bm->pci_dev);
 130
 131     if (size != 1) {
 132         return;
 133     }
 134
 135     trace_bmdma_write_cmd646(addr, val);
 136     switch(addr & 3) {
 137     case 0:
 138         bmdma_cmd_writeb(bm, val);
 139         break;
 140     case 1:
 141         pci_dev->config[MRDMODE] =
 142             (pci_dev->config[MRDMODE] & ~0x30) | (val & 0x30);
 143         cmd646_update_dma_interrupts(pci_dev);
 144         cmd646_update_irq(pci_dev);
 145         break;
 146     case 2:
 147         bm->status = (val & 0x60) | (bm->status & 1) | (bm->status & ~val & 0x06);
 148         break;
 149     case 3:
 150         if (bm == &bm->pci_dev->bmdma[0]) {
 151             pci_dev->config[UDIDETCR0] = val;
 152         } else {
 153             pci_dev->config[UDIDETCR1] = val;
 154         }
 155         break;
 156     }
 157 }
 158
 159 static const MemoryRegionOps cmd646_bmdma_ops = {
 160     .read = bmdma_read,
 161     .write = bmdma_write,
 162 };
 163
 164 static void bmdma_setup_bar(PCIIDEState *d)
 165 {
 166     BMDMAState *bm;
 167     int i;
 168
 169     memory_region_init(&d->bmdma_bar, OBJECT(d), "cmd646-bmdma", 16);
 170     for(i = 0;i < 2; i++) {
 171         bm = &d->bmdma[i];
 172         memory_region_init_io(&bm->extra_io, OBJECT(d), &cmd646_bmdma_ops, bm,
 173                               "cmd646-bmdma-bus", 4);
 174         memory_region_add_subregion(&d->bmdma_bar, i * 8, &bm->extra_io);
 175         memory_region_init_io(&bm->addr_ioport, OBJECT(d),
 176                               &bmdma_addr_ioport_ops, bm,
 177                               "cmd646-bmdma-ioport", 4);
 178         memory_region_add_subregion(&d->bmdma_bar, i * 8 + 4, &bm->addr_ioport);
 179     }
 180 }
 181
 182 static void cmd646_update_irq(PCIDevice *pd)
 183 {
 184     int pci_level;
 185
 186     pci_level = ((pd->config[MRDMODE] & MRDMODE_INTR_CH0) &&
 187                  !(pd->config[MRDMODE] & MRDMODE_BLK_CH0)) ||
 188         ((pd->config[MRDMODE] & MRDMODE_INTR_CH1) &&
 189          !(pd->config[MRDMODE] & MRDMODE_BLK_CH1));
 190     pci_set_irq(pd, pci_level);
 191 }
 192
 193 /* the PCI irq level is the logical OR of the two channels */
 194 static void cmd646_set_irq(void *opaque, int channel, int level)
 195 {
 196     PCIIDEState *d = opaque;
 197     PCIDevice *pd = PCI_DEVICE(d);
 198     int irq_mask;
 199
 200     irq_mask = MRDMODE_INTR_CH0 << channel;
 201     if (level) {
 202         pd->config[MRDMODE] |= irq_mask;
 203     } else {
 204         pd->config[MRDMODE] &= ~irq_mask;
 205     }
 206     cmd646_update_dma_interrupts(pd);
 207     cmd646_update_irq(pd);
 208 }
 209
 210 static void cmd646_reset(DeviceState *dev)
 211 {
 212     PCIIDEState *d = PCI_IDE(dev);
 213     unsigned int i;
 214
 215     for (i = 0; i < 2; i++) {
 216         ide_bus_reset(&d->bus[i]);
 217     }
 218 }
 219
 220 static uint32_t cmd646_pci_config_read(PCIDevice *d,
 221                                        uint32_t address, int len)
 222 {
 223     return pci_default_read_config(d, address, len);
 224 }
 225
 226 static void cmd646_pci_config_write(PCIDevice *d, uint32_t addr, uint32_t val,
 227                                     int l)
 228 {
 229     uint32_t i;
 230
 231     pci_default_write_config(d, addr, val, l);
 232
 233     for (i = addr; i < addr + l; i++) {
 234         switch (i) {
 235         case CFR:
 236         case ARTTIM23:
 237             cmd646_update_udma_interrupts(d);
 238             break;
 239         case MRDMODE:
 240             cmd646_update_dma_interrupts(d);
 241             break;
 242         }
 243     }
 244
 245     cmd646_update_irq(d);
 246 }
 247
 248 /* CMD646 PCI IDE controller */
 249 static void pci_cmd646_ide_realize(PCIDevice *dev, Error **errp)
 250 {
 251     PCIIDEState *d = PCI_IDE(dev);
 252     DeviceState *ds = DEVICE(dev);
 253     uint8_t *pci_conf = dev->config;
 254     int i;
 255
 256     pci_conf[PCI_CLASS_PROG] = 0x8f;
 257
 258     pci_conf[CNTRL] = CNTRL_EN_CH0; // enable IDE0
 259     if (d->secondary) {
 260         /* XXX: if not enabled, really disable the seconday IDE controller */
 261         pci_conf[CNTRL] |= CNTRL_EN_CH1; /* enable IDE1 */
 262     }
 263
 264     /* Set write-to-clear interrupt bits */
 265     dev->wmask[CFR] = 0x0;
 266     dev->w1cmask[CFR] = CFR_INTR_CH0;
 267     dev->wmask[ARTTIM23] = 0x0;
 268     dev->w1cmask[ARTTIM23] = ARTTIM23_INTR_CH1;
 269     dev->wmask[MRDMODE] = 0x0;
 270     dev->w1cmask[MRDMODE] = MRDMODE_INTR_CH0 | MRDMODE_INTR_CH1;
 271
 272     memory_region_init_io(&d->data_bar[0], OBJECT(d), &pci_ide_data_le_ops,
 273                           &d->bus[0], "cmd646-data0", 8);
 274     pci_register_bar(dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &d->data_bar[0]);
 275
 276     memory_region_init_io(&d->cmd_bar[0], OBJECT(d), &pci_ide_cmd_le_ops,
 277                           &d->bus[0], "cmd646-cmd0", 4);
 278     pci_register_bar(dev, 1, PCI_BASE_ADDRESS_SPACE_IO, &d->cmd_bar[0]);
 279
 280     memory_region_init_io(&d->data_bar[1], OBJECT(d), &pci_ide_data_le_ops,
 281                           &d->bus[1], "cmd646-data1", 8);
 282     pci_register_bar(dev, 2, PCI_BASE_ADDRESS_SPACE_IO, &d->data_bar[1]);
 283
 284     memory_region_init_io(&d->cmd_bar[1], OBJECT(d), &pci_ide_cmd_le_ops,
 285                           &d->bus[1], "cmd646-cmd1", 4);
 286     pci_register_bar(dev, 3, PCI_BASE_ADDRESS_SPACE_IO, &d->cmd_bar[1]);
 287
 288     bmdma_setup_bar(d);
 289     pci_register_bar(dev, 4, PCI_BASE_ADDRESS_SPACE_IO, &d->bmdma_bar);
 290
 291     /* TODO: RST# value should be 0 */
 292     pci_conf[PCI_INTERRUPT_PIN] = 0x01; // interrupt on pin 1
 293
 294     qdev_init_gpio_in(ds, cmd646_set_irq, 2);
 295     for (i = 0; i < 2; i++) {
 296         ide_bus_new(&d->bus[i], sizeof(d->bus[i]), ds, i, 2);
 297         ide_init2(&d->bus[i], qdev_get_gpio_in(ds, i));
 298
 299         bmdma_init(&d->bus[i], &d->bmdma[i], d);
 300         d->bmdma[i].bus = &d->bus[i];
 301         ide_register_restart_cb(&d->bus[i]);
 302     }
 303 }
 304
 305 static void pci_cmd646_ide_exitfn(PCIDevice *dev)
 306 {
 307     PCIIDEState *d = PCI_IDE(dev);
 308     unsigned i;
 309
 310     for (i = 0; i < 2; ++i) {
 311         memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].extra_io);
 312         memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].addr_ioport);
 313     }
 314 }
 315
 316 static Property cmd646_ide_properties[] = {
 317     DEFINE_PROP_UINT32("secondary", PCIIDEState, secondary, 0),
 318     DEFINE_PROP_END_OF_LIST(),
 319 };
 320
 321 static void cmd646_ide_class_init(ObjectClass *klass, void *data)
 322 {
 323     DeviceClass *dc = DEVICE_CLASS(klass);
 324     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 325
 326     dc->reset = cmd646_reset;
 327     dc->vmsd = &vmstate_ide_pci;
 328     k->realize = pci_cmd646_ide_realize;
 329     k->exit = pci_cmd646_ide_exitfn;
 330     k->vendor_id = PCI_VENDOR_ID_CMD;
 331     k->device_id = PCI_DEVICE_ID_CMD_646;
 332     k->revision = 0x07;
 333     k->class_id = PCI_CLASS_STORAGE_IDE;
 334     k->config_read = cmd646_pci_config_read;
 335     k->config_write = cmd646_pci_config_write;
 336     device_class_set_props(dc, cmd646_ide_properties);
 337     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
 338 }
 339
 340 static const TypeInfo cmd646_ide_info = {
 341     .name          = "cmd646-ide",
 342     .parent        = TYPE_PCI_IDE,
 343     .class_init    = cmd646_ide_class_init,
 344 };
 345
 346 static void cmd646_ide_register_types(void)
 347 {
 348     type_register_static(&cmd646_ide_info);
 349 }
 350
 351 type_init(cmd646_ide_register_types)