Archipelago » qemu

/*

 * QEMU IDE Emulation: PCI cmd646 support.

 *

 * Copyright (c) 2003 Fabrice Bellard

 * Copyright (c) 2006 Openedhand Ltd.

 *

 * 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.

 */

#include <hw/hw.h>

#include <hw/pc.h>

#include <hw/pci.h>

#include <hw/isa.h>

#include "block.h"

#include "block_int.h"

#include "sysemu.h"

#include "dma.h"

#include <hw/ide/pci.h>

/* CMD646 specific */

#define MRDMODE                0x71

#define   MRDMODE_INTR_CH0        0x04

#define   MRDMODE_INTR_CH1        0x08

#define   MRDMODE_BLK_CH0        0x10

#define   MRDMODE_BLK_CH1        0x20

#define UDIDETCR0        0x73

#define UDIDETCR1        0x7B

static void cmd646_update_irq(PCIIDEState *d);

static void ide_map(PCIDevice *pci_dev, int region_num,

                    pcibus_t addr, pcibus_t size, int type)

{

    PCIIDEState *d = DO_UPCAST(PCIIDEState, dev, pci_dev);

    IDEBus *bus;

    if (region_num <= 3) {

        bus = &d->bus[(region_num >> 1)];

        if (region_num & 1) {

            register_ioport_read(addr + 2, 1, 1, ide_status_read, bus);

            register_ioport_write(addr + 2, 1, 1, ide_cmd_write, bus);

        } else {

            register_ioport_write(addr, 8, 1, ide_ioport_write, bus);

            register_ioport_read(addr, 8, 1, ide_ioport_read, bus);

            /* data ports */

            register_ioport_write(addr, 2, 2, ide_data_writew, bus);

            register_ioport_read(addr, 2, 2, ide_data_readw, bus);

            register_ioport_write(addr, 4, 4, ide_data_writel, bus);

            register_ioport_read(addr, 4, 4, ide_data_readl, bus);

        }

    }

}

static uint32_t bmdma_readb_common(PCIIDEState *pci_dev, BMDMAState *bm,

                                   uint32_t addr)

{

    uint32_t val;

    switch(addr & 3) {

    case 0:

        val = bm->cmd;

        break;

    case 1:

        val = pci_dev->dev.config[MRDMODE];

        break;

    case 2:

        val = bm->status;

        break;

    case 3:

        if (bm == &pci_dev->bmdma[0]) {

            val = pci_dev->dev.config[UDIDETCR0];

        } else {

            val = pci_dev->dev.config[UDIDETCR1];

        }

        break;

    default:

        val = 0xff;

        break;

    }

#ifdef DEBUG_IDE

    printf("bmdma: readb 0x%02x : 0x%02x\n", addr, val);

#endif

    return val;

}

static uint32_t bmdma_readb_0(void *opaque, uint32_t addr)

{

    PCIIDEState *pci_dev = opaque;

    BMDMAState *bm = &pci_dev->bmdma[0];

    return bmdma_readb_common(pci_dev, bm, addr);

}

static uint32_t bmdma_readb_1(void *opaque, uint32_t addr)

{

    PCIIDEState *pci_dev = opaque;

    BMDMAState *bm = &pci_dev->bmdma[1];

    return bmdma_readb_common(pci_dev, bm, addr);

}

static void bmdma_writeb_common(PCIIDEState *pci_dev, BMDMAState *bm,

                                uint32_t addr, uint32_t val)

{

#ifdef DEBUG_IDE

    printf("bmdma: writeb 0x%02x : 0x%02x\n", addr, val);

#endif

    switch(addr & 3) {

    case 0:

        bmdma_cmd_writeb(bm, addr, val);

        break;

    case 1:

        pci_dev->dev.config[MRDMODE] =

            (pci_dev->dev.config[MRDMODE] & ~0x30) | (val & 0x30);

        cmd646_update_irq(pci_dev);

        break;

    case 2:

        bm->status = (val & 0x60) | (bm->status & 1) | (bm->status & ~val & 0x06);

        break;

    case 3:

        if (bm == &pci_dev->bmdma[0])

            pci_dev->dev.config[UDIDETCR0] = val;

        else

            pci_dev->dev.config[UDIDETCR1] = val;

        break;

    }

}

static void bmdma_writeb_0(void *opaque, uint32_t addr, uint32_t val)

{

    PCIIDEState *pci_dev = opaque;

    BMDMAState *bm = &pci_dev->bmdma[0];

    bmdma_writeb_common(pci_dev, bm, addr, val);

}

static void bmdma_writeb_1(void *opaque, uint32_t addr, uint32_t val)

{

    PCIIDEState *pci_dev = opaque;

    BMDMAState *bm = &pci_dev->bmdma[1];

    bmdma_writeb_common(pci_dev, bm, addr, val);

}

static void bmdma_map(PCIDevice *pci_dev, int region_num,

                    pcibus_t addr, pcibus_t size, int type)

{

    PCIIDEState *d = DO_UPCAST(PCIIDEState, dev, pci_dev);

    int i;

    for(i = 0;i < 2; i++) {

        BMDMAState *bm = &d->bmdma[i];

        if (i == 0) {

            register_ioport_write(addr, 4, 1, bmdma_writeb_0, d);

            register_ioport_read(addr, 4, 1, bmdma_readb_0, d);

        } else {

            register_ioport_write(addr, 4, 1, bmdma_writeb_1, d);

            register_ioport_read(addr, 4, 1, bmdma_readb_1, d);

        }

        iorange_init(&bm->addr_ioport, &bmdma_addr_ioport_ops, addr + 4, 4);

        ioport_register(&bm->addr_ioport);

        addr += 8;

    }

}

/* XXX: call it also when the MRDMODE is changed from the PCI config

   registers */

static void cmd646_update_irq(PCIIDEState *d)

{

    int pci_level;

    pci_level = ((d->dev.config[MRDMODE] & MRDMODE_INTR_CH0) &&

                 !(d->dev.config[MRDMODE] & MRDMODE_BLK_CH0)) ||

        ((d->dev.config[MRDMODE] & MRDMODE_INTR_CH1) &&

         !(d->dev.config[MRDMODE] & MRDMODE_BLK_CH1));

    qemu_set_irq(d->dev.irq[0], pci_level);

}

/* the PCI irq level is the logical OR of the two channels */

static void cmd646_set_irq(void *opaque, int channel, int level)

{

    PCIIDEState *d = opaque;

    int irq_mask;

    irq_mask = MRDMODE_INTR_CH0 << channel;

    if (level)

        d->dev.config[MRDMODE] |= irq_mask;

    else

        d->dev.config[MRDMODE] &= ~irq_mask;

    cmd646_update_irq(d);

}

static void cmd646_reset(void *opaque)

{

    PCIIDEState *d = opaque;

    unsigned int i;

    for (i = 0; i < 2; i++) {

        ide_bus_reset(&d->bus[i]);

    }

}

/* CMD646 PCI IDE controller */

static int pci_cmd646_ide_initfn(PCIDevice *dev)

{

    PCIIDEState *d = DO_UPCAST(PCIIDEState, dev, dev);

    uint8_t *pci_conf = d->dev.config;

    qemu_irq *irq;

    int i;

    pci_conf[PCI_CLASS_PROG] = 0x8f;

    pci_conf[0x51] = 0x04; // enable IDE0

    if (d->secondary) {

        /* XXX: if not enabled, really disable the seconday IDE controller */

        pci_conf[0x51] |= 0x08; /* enable IDE1 */

    }

    pci_register_bar(dev, 0, 0x8, PCI_BASE_ADDRESS_SPACE_IO, ide_map);

    pci_register_bar(dev, 1, 0x4, PCI_BASE_ADDRESS_SPACE_IO, ide_map);

    pci_register_bar(dev, 2, 0x8, PCI_BASE_ADDRESS_SPACE_IO, ide_map);

    pci_register_bar(dev, 3, 0x4, PCI_BASE_ADDRESS_SPACE_IO, ide_map);

    pci_register_bar(dev, 4, 0x10, PCI_BASE_ADDRESS_SPACE_IO, bmdma_map);

    /* TODO: RST# value should be 0 */

    pci_conf[PCI_INTERRUPT_PIN] = 0x01; // interrupt on pin 1

    irq = qemu_allocate_irqs(cmd646_set_irq, d, 2);

    for (i = 0; i < 2; i++) {

        ide_bus_new(&d->bus[i], &d->dev.qdev, i);

        ide_init2(&d->bus[i], irq[i]);

        bmdma_init(&d->bus[i], &d->bmdma[i]);

        d->bmdma[i].bus = &d->bus[i];

        qemu_add_vm_change_state_handler(d->bus[i].dma->ops->restart_cb,

                                         &d->bmdma[i].dma);

    }

    vmstate_register(&dev->qdev, 0, &vmstate_ide_pci, d);

    qemu_register_reset(cmd646_reset, d);

    return 0;

}

void pci_cmd646_ide_init(PCIBus *bus, DriveInfo **hd_table,

                         int secondary_ide_enabled)

{

    PCIDevice *dev;

    dev = pci_create(bus, -1, "cmd646-ide");

    qdev_prop_set_uint32(&dev->qdev, "secondary", secondary_ide_enabled);

    qdev_init_nofail(&dev->qdev);

    pci_ide_create_devs(dev, hd_table);

}

static PCIDeviceInfo cmd646_ide_info[] = {

    {

        .qdev.name    = "cmd646-ide",

        .qdev.size    = sizeof(PCIIDEState),

        .init         = pci_cmd646_ide_initfn,

        .vendor_id    = PCI_VENDOR_ID_CMD,

        .device_id    = PCI_DEVICE_ID_CMD_646,

        .revision     = 0x07, // IDE controller revision

        .class_id     = PCI_CLASS_STORAGE_IDE,

        .qdev.props   = (Property[]) {

            DEFINE_PROP_UINT32("secondary", PCIIDEState, secondary, 0),

            DEFINE_PROP_END_OF_LIST(),

        },

    },{

        /* end of list */

    }

};

static void cmd646_ide_register(void)

{

    pci_qdev_register_many(cmd646_ide_info);

}

device_init(cmd646_ide_register);