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 "block_int.h"
  31 #include "sysemu.h"
  32 #include "dma.h"
  33
  34 #include <hw/ide/pci.h>
  35
  36 /* CMD646 specific */
  37 #define MRDMODE         0x71
  38 #define   MRDMODE_INTR_CH0      0x04
  39 #define   MRDMODE_INTR_CH1      0x08
  40 #define   MRDMODE_BLK_CH0       0x10
  41 #define   MRDMODE_BLK_CH1       0x20
  42 #define UDIDETCR0       0x73
  43 #define UDIDETCR1       0x7B
  44
  45 static void cmd646_update_irq(PCIIDEState *d);
  46
  47 static void ide_map(PCIDevice *pci_dev, int region_num,
  48                     uint32_t addr, uint32_t size, int type)
  49 {
  50     PCIIDEState *d = DO_UPCAST(PCIIDEState, dev, pci_dev);
  51     IDEBus *bus;
  52
  53     if (region_num <= 3) {
  54         bus = &d->bus[(region_num >> 1)];
  55         if (region_num & 1) {
  56             register_ioport_read(addr + 2, 1, 1, ide_status_read, bus);
  57             register_ioport_write(addr + 2, 1, 1, ide_cmd_write, bus);
  58         } else {
  59             register_ioport_write(addr, 8, 1, ide_ioport_write, bus);
  60             register_ioport_read(addr, 8, 1, ide_ioport_read, bus);
  61
  62             /* data ports */
  63             register_ioport_write(addr, 2, 2, ide_data_writew, bus);
  64             register_ioport_read(addr, 2, 2, ide_data_readw, bus);
  65             register_ioport_write(addr, 4, 4, ide_data_writel, bus);
  66             register_ioport_read(addr, 4, 4, ide_data_readl, bus);
  67         }
  68     }
  69 }
  70
  71 static PCIIDEState *pci_from_bm(BMDMAState *bm)
  72 {
  73     if (bm->unit == 0) {
  74         return container_of(bm, PCIIDEState, bmdma[0]);
  75     } else {
  76         return container_of(bm, PCIIDEState, bmdma[1]);
  77     }
  78 }
  79
  80 static uint32_t bmdma_readb(void *opaque, uint32_t addr)
  81 {
  82     BMDMAState *bm = opaque;
  83     PCIIDEState *pci_dev = pci_from_bm(bm);
  84     uint32_t val;
  85
  86     switch(addr & 3) {
  87     case 0:
  88         val = bm->cmd;
  89         break;
  90     case 1:
  91         val = pci_dev->dev.config[MRDMODE];
  92         break;
  93     case 2:
  94         val = bm->status;
  95         break;
  96     case 3:
  97         if (bm == &pci_dev->bmdma[0]) {
  98             val = pci_dev->dev.config[UDIDETCR0];
  99         } else {
 100             val = pci_dev->dev.config[UDIDETCR1];
 101         }
 102         break;
 103     default:
 104         val = 0xff;
 105         break;
 106     }
 107 #ifdef DEBUG_IDE
 108     printf("bmdma: readb 0x%02x : 0x%02x\n", addr, val);
 109 #endif
 110     return val;
 111 }
 112
 113 static void bmdma_writeb(void *opaque, uint32_t addr, uint32_t val)
 114 {
 115     BMDMAState *bm = opaque;
 116     PCIIDEState *pci_dev = pci_from_bm(bm);
 117 #ifdef DEBUG_IDE
 118     printf("bmdma: writeb 0x%02x : 0x%02x\n", addr, val);
 119 #endif
 120     switch(addr & 3) {
 121     case 1:
 122         pci_dev->dev.config[MRDMODE] =
 123             (pci_dev->dev.config[MRDMODE] & ~0x30) | (val & 0x30);
 124         cmd646_update_irq(pci_dev);
 125         break;
 126     case 2:
 127         bm->status = (val & 0x60) | (bm->status & 1) | (bm->status & ~val & 0x06);
 128         break;
 129     case 3:
 130         if (bm == &pci_dev->bmdma[0])
 131             pci_dev->dev.config[UDIDETCR0] = val;
 132         else
 133             pci_dev->dev.config[UDIDETCR1] = val;
 134         break;
 135     }
 136 }
 137
 138 static void bmdma_map(PCIDevice *pci_dev, int region_num,
 139                     uint32_t addr, uint32_t size, int type)
 140 {
 141     PCIIDEState *d = DO_UPCAST(PCIIDEState, dev, pci_dev);
 142     int i;
 143
 144     for(i = 0;i < 2; i++) {
 145         BMDMAState *bm = &d->bmdma[i];
 146         d->bus[i].bmdma = bm;
 147         bm->pci_dev = DO_UPCAST(PCIIDEState, dev, pci_dev);
 148         bm->bus = d->bus+i;
 149         qemu_add_vm_change_state_handler(ide_dma_restart_cb, bm);
 150
 151         register_ioport_write(addr, 1, 1, bmdma_cmd_writeb, bm);
 152
 153         register_ioport_write(addr + 1, 3, 1, bmdma_writeb, bm);
 154         register_ioport_read(addr, 4, 1, bmdma_readb, bm);
 155
 156         register_ioport_write(addr + 4, 4, 1, bmdma_addr_writeb, bm);
 157         register_ioport_read(addr + 4, 4, 1, bmdma_addr_readb, bm);
 158         register_ioport_write(addr + 4, 4, 2, bmdma_addr_writew, bm);
 159         register_ioport_read(addr + 4, 4, 2, bmdma_addr_readw, bm);
 160         register_ioport_write(addr + 4, 4, 4, bmdma_addr_writel, bm);
 161         register_ioport_read(addr + 4, 4, 4, bmdma_addr_readl, bm);
 162         addr += 8;
 163     }
 164 }
 165
 166 /* XXX: call it also when the MRDMODE is changed from the PCI config
 167    registers */
 168 static void cmd646_update_irq(PCIIDEState *d)
 169 {
 170     int pci_level;
 171     pci_level = ((d->dev.config[MRDMODE] & MRDMODE_INTR_CH0) &&
 172                  !(d->dev.config[MRDMODE] & MRDMODE_BLK_CH0)) ||
 173         ((d->dev.config[MRDMODE] & MRDMODE_INTR_CH1) &&
 174          !(d->dev.config[MRDMODE] & MRDMODE_BLK_CH1));
 175     qemu_set_irq(d->dev.irq[0], pci_level);
 176 }
 177
 178 /* the PCI irq level is the logical OR of the two channels */
 179 static void cmd646_set_irq(void *opaque, int channel, int level)
 180 {
 181     PCIIDEState *d = opaque;
 182     int irq_mask;
 183
 184     irq_mask = MRDMODE_INTR_CH0 << channel;
 185     if (level)
 186         d->dev.config[MRDMODE] |= irq_mask;
 187     else
 188         d->dev.config[MRDMODE] &= ~irq_mask;
 189     cmd646_update_irq(d);
 190 }
 191
 192 static void cmd646_reset(void *opaque)
 193 {
 194     PCIIDEState *d = opaque;
 195     unsigned int i;
 196
 197     for (i = 0; i < 2; i++)
 198         ide_dma_cancel(&d->bmdma[i]);
 199 }
 200
 201 /* CMD646 PCI IDE controller */
 202 static int pci_cmd646_ide_initfn(PCIDevice *dev)
 203 {
 204     PCIIDEState *d = DO_UPCAST(PCIIDEState, dev, dev);
 205     uint8_t *pci_conf = d->dev.config;
 206     qemu_irq *irq;
 207
 208     pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_CMD);
 209     pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_CMD_646);
 210
 211     pci_conf[0x08] = 0x07; // IDE controller revision
 212     pci_conf[0x09] = 0x8f;
 213
 214     pci_config_set_class(pci_conf, PCI_CLASS_STORAGE_IDE);
 215     pci_conf[PCI_HEADER_TYPE] = PCI_HEADER_TYPE_NORMAL; // header_type
 216
 217     pci_conf[0x51] = 0x04; // enable IDE0
 218     if (d->secondary) {
 219         /* XXX: if not enabled, really disable the seconday IDE controller */
 220         pci_conf[0x51] |= 0x08; /* enable IDE1 */
 221     }
 222
 223     pci_register_bar(dev, 0, 0x8, PCI_ADDRESS_SPACE_IO, ide_map);
 224     pci_register_bar(dev, 1, 0x4, PCI_ADDRESS_SPACE_IO, ide_map);
 225     pci_register_bar(dev, 2, 0x8, PCI_ADDRESS_SPACE_IO, ide_map);
 226     pci_register_bar(dev, 3, 0x4, PCI_ADDRESS_SPACE_IO, ide_map);
 227     pci_register_bar(dev, 4, 0x10, PCI_ADDRESS_SPACE_IO, bmdma_map);
 228
 229     pci_conf[0x3d] = 0x01; // interrupt on pin 1
 230
 231     irq = qemu_allocate_irqs(cmd646_set_irq, d, 2);
 232     ide_bus_new(&d->bus[0], &d->dev.qdev);
 233     ide_bus_new(&d->bus[1], &d->dev.qdev);
 234     ide_init2(&d->bus[0], NULL, NULL, irq[0]);
 235     ide_init2(&d->bus[1], NULL, NULL, irq[1]);
 236
 237     register_savevm("ide", 0, 3, pci_ide_save, pci_ide_load, d);
 238     qemu_register_reset(cmd646_reset, d);
 239     cmd646_reset(d);
 240     return 0;
 241 }
 242
 243 void pci_cmd646_ide_init(PCIBus *bus, DriveInfo **hd_table,
 244                          int secondary_ide_enabled)
 245 {
 246     PCIDevice *dev;
 247
 248     dev = pci_create(bus, -1, "CMD646 IDE");
 249     qdev_prop_set_uint32(&dev->qdev, "secondary", secondary_ide_enabled);
 250     qdev_init_nofail(&dev->qdev);
 251
 252     pci_ide_create_devs(dev, hd_table);
 253 }
 254
 255 static PCIDeviceInfo cmd646_ide_info[] = {
 256     {
 257         .qdev.name    = "CMD646 IDE",
 258         .qdev.size    = sizeof(PCIIDEState),
 259         .init         = pci_cmd646_ide_initfn,
 260         .qdev.props   = (Property[]) {
 261             DEFINE_PROP_UINT32("secondary", PCIIDEState, secondary, 0),
 262             DEFINE_PROP_END_OF_LIST(),
 263         },
 264     },{
 265         /* end of list */
 266     }
 267 };
 268
 269 static void cmd646_ide_register(void)
 270 {
 271     pci_qdev_register_many(cmd646_ide_info);
 272 }
 273 device_init(cmd646_ide_register);