Archipelago » qemu

/*

 * Marvell MV88W8618 / Freecom MusicPal emulation.

 *

 * Copyright (c) 2008 Jan Kiszka

 *

 * This code is licensed under the GNU GPL v2.

 *

 * Contributions after 2012-01-13 are licensed under the terms of the

 * GNU GPL, version 2 or (at your option) any later version.

 */

#include "sysbus.h"

#include "arm-misc.h"

#include "devices.h"

#include "net.h"

#include "sysemu.h"

#include "boards.h"

#include "pc.h"

#include "qemu-timer.h"

#include "ptimer.h"

#include "block.h"

#include "flash.h"

#include "console.h"

#include "i2c.h"

#include "blockdev.h"

#include "exec-memory.h"

#define MP_MISC_BASE            0x80002000

#define MP_MISC_SIZE            0x00001000

#define MP_ETH_BASE             0x80008000

#define MP_ETH_SIZE             0x00001000

#define MP_WLAN_BASE            0x8000C000

#define MP_WLAN_SIZE            0x00000800

#define MP_UART1_BASE           0x8000C840

#define MP_UART2_BASE           0x8000C940

#define MP_GPIO_BASE            0x8000D000

#define MP_GPIO_SIZE            0x00001000

#define MP_FLASHCFG_BASE        0x90006000

#define MP_FLASHCFG_SIZE        0x00001000

#define MP_AUDIO_BASE           0x90007000

#define MP_PIC_BASE             0x90008000

#define MP_PIC_SIZE             0x00001000

#define MP_PIT_BASE             0x90009000

#define MP_PIT_SIZE             0x00001000

#define MP_LCD_BASE             0x9000c000

#define MP_LCD_SIZE             0x00001000

#define MP_SRAM_BASE            0xC0000000

#define MP_SRAM_SIZE            0x00020000

#define MP_RAM_DEFAULT_SIZE     32*1024*1024

#define MP_FLASH_SIZE_MAX       32*1024*1024

#define MP_TIMER1_IRQ           4

#define MP_TIMER2_IRQ           5

#define MP_TIMER3_IRQ           6

#define MP_TIMER4_IRQ           7

#define MP_EHCI_IRQ             8

#define MP_ETH_IRQ              9

#define MP_UART1_IRQ            11

#define MP_UART2_IRQ            11

#define MP_GPIO_IRQ             12

#define MP_RTC_IRQ              28

#define MP_AUDIO_IRQ            30

/* Wolfson 8750 I2C address */

#define MP_WM_ADDR              0x1A

/* Ethernet register offsets */

#define MP_ETH_SMIR             0x010

#define MP_ETH_PCXR             0x408

#define MP_ETH_SDCMR            0x448

#define MP_ETH_ICR              0x450

#define MP_ETH_IMR              0x458

#define MP_ETH_FRDP0            0x480

#define MP_ETH_FRDP1            0x484

#define MP_ETH_FRDP2            0x488

#define MP_ETH_FRDP3            0x48C

#define MP_ETH_CRDP0            0x4A0

#define MP_ETH_CRDP1            0x4A4

#define MP_ETH_CRDP2            0x4A8

#define MP_ETH_CRDP3            0x4AC

#define MP_ETH_CTDP0            0x4E0

#define MP_ETH_CTDP1            0x4E4

#define MP_ETH_CTDP2            0x4E8

#define MP_ETH_CTDP3            0x4EC

/* MII PHY access */

#define MP_ETH_SMIR_DATA        0x0000FFFF

#define MP_ETH_SMIR_ADDR        0x03FF0000

#define MP_ETH_SMIR_OPCODE      (1 << 26) /* Read value */

#define MP_ETH_SMIR_RDVALID     (1 << 27)

/* PHY registers */

#define MP_ETH_PHY1_BMSR        0x00210000

#define MP_ETH_PHY1_PHYSID1     0x00410000

#define MP_ETH_PHY1_PHYSID2     0x00610000

#define MP_PHY_BMSR_LINK        0x0004

#define MP_PHY_BMSR_AUTONEG     0x0008

#define MP_PHY_88E3015          0x01410E20

/* TX descriptor status */

#define MP_ETH_TX_OWN           (1 << 31)

/* RX descriptor status */

#define MP_ETH_RX_OWN           (1 << 31)

/* Interrupt cause/mask bits */

#define MP_ETH_IRQ_RX_BIT       0

#define MP_ETH_IRQ_RX           (1 << MP_ETH_IRQ_RX_BIT)

#define MP_ETH_IRQ_TXHI_BIT     2

#define MP_ETH_IRQ_TXLO_BIT     3

/* Port config bits */

#define MP_ETH_PCXR_2BSM_BIT    28 /* 2-byte incoming suffix */

/* SDMA command bits */

#define MP_ETH_CMD_TXHI         (1 << 23)

#define MP_ETH_CMD_TXLO         (1 << 22)

typedef struct mv88w8618_tx_desc {

    uint32_t cmdstat;

    uint16_t res;

    uint16_t bytes;

    uint32_t buffer;

    uint32_t next;

} mv88w8618_tx_desc;

typedef struct mv88w8618_rx_desc {

    uint32_t cmdstat;

    uint16_t bytes;

    uint16_t buffer_size;

    uint32_t buffer;

    uint32_t next;

} mv88w8618_rx_desc;

typedef struct mv88w8618_eth_state {

    SysBusDevice busdev;

    MemoryRegion iomem;

    qemu_irq irq;

    uint32_t smir;

    uint32_t icr;

    uint32_t imr;

    int mmio_index;

    uint32_t vlan_header;

    uint32_t tx_queue[2];

    uint32_t rx_queue[4];

    uint32_t frx_queue[4];

    uint32_t cur_rx[4];

    NICState *nic;

    NICConf conf;

} mv88w8618_eth_state;

static void eth_rx_desc_put(uint32_t addr, mv88w8618_rx_desc *desc)

{

    cpu_to_le32s(&desc->cmdstat);

    cpu_to_le16s(&desc->bytes);

    cpu_to_le16s(&desc->buffer_size);

    cpu_to_le32s(&desc->buffer);

    cpu_to_le32s(&desc->next);

    cpu_physical_memory_write(addr, (void *)desc, sizeof(*desc));

}

static void eth_rx_desc_get(uint32_t addr, mv88w8618_rx_desc *desc)

{

    cpu_physical_memory_read(addr, (void *)desc, sizeof(*desc));

    le32_to_cpus(&desc->cmdstat);

    le16_to_cpus(&desc->bytes);

    le16_to_cpus(&desc->buffer_size);

    le32_to_cpus(&desc->buffer);

    le32_to_cpus(&desc->next);

}

static int eth_can_receive(NetClientState *nc)

{

    return 1;

}

static ssize_t eth_receive(NetClientState *nc, const uint8_t *buf, size_t size)

{

    mv88w8618_eth_state *s = DO_UPCAST(NICState, nc, nc)->opaque;

    uint32_t desc_addr;

    mv88w8618_rx_desc desc;

    int i;

    for (i = 0; i < 4; i++) {

        desc_addr = s->cur_rx[i];

        if (!desc_addr) {

            continue;

        }

        do {

            eth_rx_desc_get(desc_addr, &desc);

            if ((desc.cmdstat & MP_ETH_RX_OWN) && desc.buffer_size >= size) {

                cpu_physical_memory_write(desc.buffer + s->vlan_header,

                                          buf, size);

                desc.bytes = size + s->vlan_header;

                desc.cmdstat &= ~MP_ETH_RX_OWN;

                s->cur_rx[i] = desc.next;

                s->icr |= MP_ETH_IRQ_RX;

                if (s->icr & s->imr) {

                    qemu_irq_raise(s->irq);

                }

                eth_rx_desc_put(desc_addr, &desc);

                return size;

            }

            desc_addr = desc.next;

        } while (desc_addr != s->rx_queue[i]);

    }

    return size;

}

static void eth_tx_desc_put(uint32_t addr, mv88w8618_tx_desc *desc)

{

    cpu_to_le32s(&desc->cmdstat);

    cpu_to_le16s(&desc->res);

    cpu_to_le16s(&desc->bytes);

    cpu_to_le32s(&desc->buffer);

    cpu_to_le32s(&desc->next);

    cpu_physical_memory_write(addr, (void *)desc, sizeof(*desc));

}

static void eth_tx_desc_get(uint32_t addr, mv88w8618_tx_desc *desc)

{

    cpu_physical_memory_read(addr, (void *)desc, sizeof(*desc));

    le32_to_cpus(&desc->cmdstat);

    le16_to_cpus(&desc->res);

    le16_to_cpus(&desc->bytes);

    le32_to_cpus(&desc->buffer);

    le32_to_cpus(&desc->next);

}

static void eth_send(mv88w8618_eth_state *s, int queue_index)

{

    uint32_t desc_addr = s->tx_queue[queue_index];

    mv88w8618_tx_desc desc;

    uint32_t next_desc;

    uint8_t buf[2048];

    int len;

    do {

        eth_tx_desc_get(desc_addr, &desc);

        next_desc = desc.next;

        if (desc.cmdstat & MP_ETH_TX_OWN) {

            len = desc.bytes;

            if (len < 2048) {

                cpu_physical_memory_read(desc.buffer, buf, len);

                qemu_send_packet(&s->nic->nc, buf, len);

            }

            desc.cmdstat &= ~MP_ETH_TX_OWN;

            s->icr |= 1 << (MP_ETH_IRQ_TXLO_BIT - queue_index);

            eth_tx_desc_put(desc_addr, &desc);

        }

        desc_addr = next_desc;

    } while (desc_addr != s->tx_queue[queue_index]);

}

static uint64_t mv88w8618_eth_read(void *opaque, target_phys_addr_t offset,

                                   unsigned size)

{

    mv88w8618_eth_state *s = opaque;

    switch (offset) {

    case MP_ETH_SMIR:

        if (s->smir & MP_ETH_SMIR_OPCODE) {

            switch (s->smir & MP_ETH_SMIR_ADDR) {

            case MP_ETH_PHY1_BMSR:

                return MP_PHY_BMSR_LINK | MP_PHY_BMSR_AUTONEG |

                       MP_ETH_SMIR_RDVALID;

            case MP_ETH_PHY1_PHYSID1:

                return (MP_PHY_88E3015 >> 16) | MP_ETH_SMIR_RDVALID;

            case MP_ETH_PHY1_PHYSID2:

                return (MP_PHY_88E3015 & 0xFFFF) | MP_ETH_SMIR_RDVALID;

            default:

                return MP_ETH_SMIR_RDVALID;

            }

        }

        return 0;

    case MP_ETH_ICR:

        return s->icr;

    case MP_ETH_IMR:

        return s->imr;

    case MP_ETH_FRDP0 ... MP_ETH_FRDP3:

        return s->frx_queue[(offset - MP_ETH_FRDP0)/4];

    case MP_ETH_CRDP0 ... MP_ETH_CRDP3:

        return s->rx_queue[(offset - MP_ETH_CRDP0)/4];

    case MP_ETH_CTDP0 ... MP_ETH_CTDP3:

        return s->tx_queue[(offset - MP_ETH_CTDP0)/4];

    default:

        return 0;

    }

}

static void mv88w8618_eth_write(void *opaque, target_phys_addr_t offset,

                                uint64_t value, unsigned size)

{

    mv88w8618_eth_state *s = opaque;

    switch (offset) {

    case MP_ETH_SMIR:

        s->smir = value;

        break;

    case MP_ETH_PCXR:

        s->vlan_header = ((value >> MP_ETH_PCXR_2BSM_BIT) & 1) * 2;

        break;

    case MP_ETH_SDCMR:

        if (value & MP_ETH_CMD_TXHI) {

            eth_send(s, 1);

        }

        if (value & MP_ETH_CMD_TXLO) {

            eth_send(s, 0);

        }

        if (value & (MP_ETH_CMD_TXHI | MP_ETH_CMD_TXLO) && s->icr & s->imr) {

            qemu_irq_raise(s->irq);

        }

        break;

    case MP_ETH_ICR:

        s->icr &= value;

        break;

    case MP_ETH_IMR:

        s->imr = value;

        if (s->icr & s->imr) {

            qemu_irq_raise(s->irq);

        }

        break;

    case MP_ETH_FRDP0 ... MP_ETH_FRDP3:

        s->frx_queue[(offset - MP_ETH_FRDP0)/4] = value;

        break;

    case MP_ETH_CRDP0 ... MP_ETH_CRDP3:

        s->rx_queue[(offset - MP_ETH_CRDP0)/4] =

            s->cur_rx[(offset - MP_ETH_CRDP0)/4] = value;

        break;

    case MP_ETH_CTDP0 ... MP_ETH_CTDP3:

        s->tx_queue[(offset - MP_ETH_CTDP0)/4] = value;

        break;

    }

}

static const MemoryRegionOps mv88w8618_eth_ops = {

    .read = mv88w8618_eth_read,

    .write = mv88w8618_eth_write,

    .endianness = DEVICE_NATIVE_ENDIAN,

};

static void eth_cleanup(NetClientState *nc)

{

    mv88w8618_eth_state *s = DO_UPCAST(NICState, nc, nc)->opaque;

    s->nic = NULL;

}

static NetClientInfo net_mv88w8618_info = {

    .type = NET_CLIENT_OPTIONS_KIND_NIC,

    .size = sizeof(NICState),

    .can_receive = eth_can_receive,

    .receive = eth_receive,

    .cleanup = eth_cleanup,

};

static int mv88w8618_eth_init(SysBusDevice *dev)

{

    mv88w8618_eth_state *s = FROM_SYSBUS(mv88w8618_eth_state, dev);

    sysbus_init_irq(dev, &s->irq);

    s->nic = qemu_new_nic(&net_mv88w8618_info, &s->conf,

                          object_get_typename(OBJECT(dev)), dev->qdev.id, s);

    memory_region_init_io(&s->iomem, &mv88w8618_eth_ops, s, "mv88w8618-eth",

                          MP_ETH_SIZE);

    sysbus_init_mmio(dev, &s->iomem);

    return 0;

}

static const VMStateDescription mv88w8618_eth_vmsd = {

    .name = "mv88w8618_eth",

    .version_id = 1,

    .minimum_version_id = 1,

    .minimum_version_id_old = 1,

    .fields = (VMStateField[]) {

        VMSTATE_UINT32(smir, mv88w8618_eth_state),

        VMSTATE_UINT32(icr, mv88w8618_eth_state),

        VMSTATE_UINT32(imr, mv88w8618_eth_state),

        VMSTATE_UINT32(vlan_header, mv88w8618_eth_state),

        VMSTATE_UINT32_ARRAY(tx_queue, mv88w8618_eth_state, 2),

        VMSTATE_UINT32_ARRAY(rx_queue, mv88w8618_eth_state, 4),

        VMSTATE_UINT32_ARRAY(frx_queue, mv88w8618_eth_state, 4),

        VMSTATE_UINT32_ARRAY(cur_rx, mv88w8618_eth_state, 4),

        VMSTATE_END_OF_LIST()

    }

};

static Property mv88w8618_eth_properties[] = {

    DEFINE_NIC_PROPERTIES(mv88w8618_eth_state, conf),

    DEFINE_PROP_END_OF_LIST(),

};

static void mv88w8618_eth_class_init(ObjectClass *klass, void *data)

{

    DeviceClass *dc = DEVICE_CLASS(klass);

    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);

    k->init = mv88w8618_eth_init;

    dc->vmsd = &mv88w8618_eth_vmsd;

    dc->props = mv88w8618_eth_properties;

}

static TypeInfo mv88w8618_eth_info = {

    .name          = "mv88w8618_eth",

    .parent        = TYPE_SYS_BUS_DEVICE,

    .instance_size = sizeof(mv88w8618_eth_state),

    .class_init    = mv88w8618_eth_class_init,

};

/* LCD register offsets */

#define MP_LCD_IRQCTRL          0x180

#define MP_LCD_IRQSTAT          0x184

#define MP_LCD_SPICTRL          0x1ac

#define MP_LCD_INST             0x1bc

#define MP_LCD_DATA             0x1c0

/* Mode magics */

#define MP_LCD_SPI_DATA         0x00100011

#define MP_LCD_SPI_CMD          0x00104011

#define MP_LCD_SPI_INVALID      0x00000000

/* Commmands */

#define MP_LCD_INST_SETPAGE0    0xB0

/* ... */

#define MP_LCD_INST_SETPAGE7    0xB7

#define MP_LCD_TEXTCOLOR        0xe0e0ff /* RRGGBB */

typedef struct musicpal_lcd_state {

    SysBusDevice busdev;

    MemoryRegion iomem;

    uint32_t brightness;

    uint32_t mode;

    uint32_t irqctrl;

    uint32_t page;

    uint32_t page_off;

    DisplayState *ds;

    uint8_t video_ram[128*64/8];

} musicpal_lcd_state;

static uint8_t scale_lcd_color(musicpal_lcd_state *s, uint8_t col)

{

    switch (s->brightness) {

    case 7:

        return col;

    case 0:

        return 0;

    default:

        return (col * s->brightness) / 7;

    }

}

#define SET_LCD_PIXEL(depth, type) \

static inline void glue(set_lcd_pixel, depth) \

        (musicpal_lcd_state *s, int x, int y, type col) \

{ \

    int dx, dy; \

    type *pixel = &((type *) ds_get_data(s->ds))[(y * 128 * 3 + x) * 3]; \

\

    for (dy = 0; dy < 3; dy++, pixel += 127 * 3) \

        for (dx = 0; dx < 3; dx++, pixel++) \

            *pixel = col; \

}

SET_LCD_PIXEL(8, uint8_t)

SET_LCD_PIXEL(16, uint16_t)

SET_LCD_PIXEL(32, uint32_t)

#include "pixel_ops.h"

static void lcd_refresh(void *opaque)

{

    musicpal_lcd_state *s = opaque;

    int x, y, col;

    switch (ds_get_bits_per_pixel(s->ds)) {

    case 0:

        return;

#define LCD_REFRESH(depth, func) \

    case depth: \

        col = func(scale_lcd_color(s, (MP_LCD_TEXTCOLOR >> 16) & 0xff), \

                   scale_lcd_color(s, (MP_LCD_TEXTCOLOR >> 8) & 0xff), \

                   scale_lcd_color(s, MP_LCD_TEXTCOLOR & 0xff)); \

        for (x = 0; x < 128; x++) { \

            for (y = 0; y < 64; y++) { \

                if (s->video_ram[x + (y/8)*128] & (1 << (y % 8))) { \

                    glue(set_lcd_pixel, depth)(s, x, y, col); \

                } else { \

                    glue(set_lcd_pixel, depth)(s, x, y, 0); \

                } \

            } \

        } \

        break;

    LCD_REFRESH(8, rgb_to_pixel8)

    LCD_REFRESH(16, rgb_to_pixel16)

    LCD_REFRESH(32, (is_surface_bgr(s->ds->surface) ?

                     rgb_to_pixel32bgr : rgb_to_pixel32))

    default:

        hw_error("unsupported colour depth %i\n",

                  ds_get_bits_per_pixel(s->ds));

    }

    dpy_update(s->ds, 0, 0, 128*3, 64*3);

}

static void lcd_invalidate(void *opaque)

{

}

static void musicpal_lcd_gpio_brigthness_in(void *opaque, int irq, int level)

{

    musicpal_lcd_state *s = opaque;

    s->brightness &= ~(1 << irq);

    s->brightness |= level << irq;

}

static uint64_t musicpal_lcd_read(void *opaque, target_phys_addr_t offset,

                                  unsigned size)

{

    musicpal_lcd_state *s = opaque;

    switch (offset) {

    case MP_LCD_IRQCTRL:

        return s->irqctrl;

    default:

        return 0;

    }

}

static void musicpal_lcd_write(void *opaque, target_phys_addr_t offset,

                               uint64_t value, unsigned size)

{

    musicpal_lcd_state *s = opaque;

    switch (offset) {

    case MP_LCD_IRQCTRL:

        s->irqctrl = value;

        break;

    case MP_LCD_SPICTRL:

        if (value == MP_LCD_SPI_DATA || value == MP_LCD_SPI_CMD) {

            s->mode = value;

        } else {

            s->mode = MP_LCD_SPI_INVALID;

        }

        break;

    case MP_LCD_INST:

        if (value >= MP_LCD_INST_SETPAGE0 && value <= MP_LCD_INST_SETPAGE7) {

            s->page = value - MP_LCD_INST_SETPAGE0;

            s->page_off = 0;

        }

        break;

    case MP_LCD_DATA:

        if (s->mode == MP_LCD_SPI_CMD) {

            if (value >= MP_LCD_INST_SETPAGE0 &&

                value <= MP_LCD_INST_SETPAGE7) {

                s->page = value - MP_LCD_INST_SETPAGE0;

                s->page_off = 0;

            }

        } else if (s->mode == MP_LCD_SPI_DATA) {

            s->video_ram[s->page*128 + s->page_off] = value;

            s->page_off = (s->page_off + 1) & 127;

        }

        break;

    }

}

static const MemoryRegionOps musicpal_lcd_ops = {

    .read = musicpal_lcd_read,

    .write = musicpal_lcd_write,

    .endianness = DEVICE_NATIVE_ENDIAN,

};

static int musicpal_lcd_init(SysBusDevice *dev)

{

    musicpal_lcd_state *s = FROM_SYSBUS(musicpal_lcd_state, dev);

    s->brightness = 7;

    memory_region_init_io(&s->iomem, &musicpal_lcd_ops, s,

                          "musicpal-lcd", MP_LCD_SIZE);

    sysbus_init_mmio(dev, &s->iomem);

    s->ds = graphic_console_init(lcd_refresh, lcd_invalidate,

                                 NULL, NULL, s);

    qemu_console_resize(s->ds, 128*3, 64*3);

    qdev_init_gpio_in(&dev->qdev, musicpal_lcd_gpio_brigthness_in, 3);

    return 0;

}

static const VMStateDescription musicpal_lcd_vmsd = {

    .name = "musicpal_lcd",

    .version_id = 1,

    .minimum_version_id = 1,

    .minimum_version_id_old = 1,

    .fields = (VMStateField[]) {

        VMSTATE_UINT32(brightness, musicpal_lcd_state),

        VMSTATE_UINT32(mode, musicpal_lcd_state),

        VMSTATE_UINT32(irqctrl, musicpal_lcd_state),

        VMSTATE_UINT32(page, musicpal_lcd_state),

        VMSTATE_UINT32(page_off, musicpal_lcd_state),

        VMSTATE_BUFFER(video_ram, musicpal_lcd_state),

        VMSTATE_END_OF_LIST()

    }

};

static void musicpal_lcd_class_init(ObjectClass *klass, void *data)

{

    DeviceClass *dc = DEVICE_CLASS(klass);

    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);

    k->init = musicpal_lcd_init;

    dc->vmsd = &musicpal_lcd_vmsd;

}

static TypeInfo musicpal_lcd_info = {

    .name          = "musicpal_lcd",

    .parent        = TYPE_SYS_BUS_DEVICE,

    .instance_size = sizeof(musicpal_lcd_state),

    .class_init    = musicpal_lcd_class_init,

};

/* PIC register offsets */

#define MP_PIC_STATUS           0x00

#define MP_PIC_ENABLE_SET       0x08

#define MP_PIC_ENABLE_CLR       0x0C

typedef struct mv88w8618_pic_state

{

    SysBusDevice busdev;

    MemoryRegion iomem;

    uint32_t level;

    uint32_t enabled;

    qemu_irq parent_irq;

} mv88w8618_pic_state;

static void mv88w8618_pic_update(mv88w8618_pic_state *s)

{

    qemu_set_irq(s->parent_irq, (s->level & s->enabled));

}

static void mv88w8618_pic_set_irq(void *opaque, int irq, int level)

{

    mv88w8618_pic_state *s = opaque;

    if (level) {

        s->level |= 1 << irq;

    } else {

        s->level &= ~(1 << irq);

    }

    mv88w8618_pic_update(s);

}

static uint64_t mv88w8618_pic_read(void *opaque, target_phys_addr_t offset,

                                   unsigned size)

{

    mv88w8618_pic_state *s = opaque;

    switch (offset) {

    case MP_PIC_STATUS:

        return s->level & s->enabled;

    default:

        return 0;

    }

}

static void mv88w8618_pic_write(void *opaque, target_phys_addr_t offset,

                                uint64_t value, unsigned size)

{

    mv88w8618_pic_state *s = opaque;

    switch (offset) {

    case MP_PIC_ENABLE_SET:

        s->enabled |= value;

        break;

    case MP_PIC_ENABLE_CLR:

        s->enabled &= ~value;

        s->level &= ~value;

        break;

    }

    mv88w8618_pic_update(s);

}

static void mv88w8618_pic_reset(DeviceState *d)

{

    mv88w8618_pic_state *s = FROM_SYSBUS(mv88w8618_pic_state,

                                         sysbus_from_qdev(d));

    s->level = 0;

    s->enabled = 0;

}

static const MemoryRegionOps mv88w8618_pic_ops = {

    .read = mv88w8618_pic_read,

    .write = mv88w8618_pic_write,

    .endianness = DEVICE_NATIVE_ENDIAN,

};

static int mv88w8618_pic_init(SysBusDevice *dev)

{

    mv88w8618_pic_state *s = FROM_SYSBUS(mv88w8618_pic_state, dev);

    qdev_init_gpio_in(&dev->qdev, mv88w8618_pic_set_irq, 32);

    sysbus_init_irq(dev, &s->parent_irq);

    memory_region_init_io(&s->iomem, &mv88w8618_pic_ops, s,

                          "musicpal-pic", MP_PIC_SIZE);

    sysbus_init_mmio(dev, &s->iomem);

    return 0;

}

static const VMStateDescription mv88w8618_pic_vmsd = {

    .name = "mv88w8618_pic",

    .version_id = 1,

    .minimum_version_id = 1,

    .minimum_version_id_old = 1,

    .fields = (VMStateField[]) {

        VMSTATE_UINT32(level, mv88w8618_pic_state),

        VMSTATE_UINT32(enabled, mv88w8618_pic_state),

        VMSTATE_END_OF_LIST()

    }

};

static void mv88w8618_pic_class_init(ObjectClass *klass, void *data)

{

    DeviceClass *dc = DEVICE_CLASS(klass);

    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);

    k->init = mv88w8618_pic_init;

    dc->reset = mv88w8618_pic_reset;

    dc->vmsd = &mv88w8618_pic_vmsd;

}

static TypeInfo mv88w8618_pic_info = {

    .name          = "mv88w8618_pic",

    .parent        = TYPE_SYS_BUS_DEVICE,

    .instance_size = sizeof(mv88w8618_pic_state),

    .class_init    = mv88w8618_pic_class_init,

};

/* PIT register offsets */

#define MP_PIT_TIMER1_LENGTH    0x00

/* ... */

#define MP_PIT_TIMER4_LENGTH    0x0C

#define MP_PIT_CONTROL          0x10

#define MP_PIT_TIMER1_VALUE     0x14

/* ... */

#define MP_PIT_TIMER4_VALUE     0x20

#define MP_BOARD_RESET          0x34

/* Magic board reset value (probably some watchdog behind it) */

#define MP_BOARD_RESET_MAGIC    0x10000

typedef struct mv88w8618_timer_state {

    ptimer_state *ptimer;

    uint32_t limit;

    int freq;

    qemu_irq irq;

} mv88w8618_timer_state;

typedef struct mv88w8618_pit_state {

    SysBusDevice busdev;

    MemoryRegion iomem;

    mv88w8618_timer_state timer[4];

} mv88w8618_pit_state;

static void mv88w8618_timer_tick(void *opaque)

{

    mv88w8618_timer_state *s = opaque;

    qemu_irq_raise(s->irq);

}

static void mv88w8618_timer_init(SysBusDevice *dev, mv88w8618_timer_state *s,

                                 uint32_t freq)

{

    QEMUBH *bh;

    sysbus_init_irq(dev, &s->irq);

    s->freq = freq;

    bh = qemu_bh_new(mv88w8618_timer_tick, s);

    s->ptimer = ptimer_init(bh);

}

static uint64_t mv88w8618_pit_read(void *opaque, target_phys_addr_t offset,

                                   unsigned size)

{

    mv88w8618_pit_state *s = opaque;

    mv88w8618_timer_state *t;

    switch (offset) {

    case MP_PIT_TIMER1_VALUE ... MP_PIT_TIMER4_VALUE:

        t = &s->timer[(offset-MP_PIT_TIMER1_VALUE) >> 2];

        return ptimer_get_count(t->ptimer);

    default:

        return 0;

    }

}

static void mv88w8618_pit_write(void *opaque, target_phys_addr_t offset,

                                uint64_t value, unsigned size)

{

    mv88w8618_pit_state *s = opaque;

    mv88w8618_timer_state *t;

    int i;

    switch (offset) {

    case MP_PIT_TIMER1_LENGTH ... MP_PIT_TIMER4_LENGTH:

        t = &s->timer[offset >> 2];

        t->limit = value;

        if (t->limit > 0) {

            ptimer_set_limit(t->ptimer, t->limit, 1);

        } else {

            ptimer_stop(t->ptimer);

        }

        break;

    case MP_PIT_CONTROL:

        for (i = 0; i < 4; i++) {

            t = &s->timer[i];

            if (value & 0xf && t->limit > 0) {

                ptimer_set_limit(t->ptimer, t->limit, 0);

                ptimer_set_freq(t->ptimer, t->freq);

                ptimer_run(t->ptimer, 0);

            } else {

                ptimer_stop(t->ptimer);

            }

            value >>= 4;

        }

        break;

    case MP_BOARD_RESET:

        if (value == MP_BOARD_RESET_MAGIC) {

            qemu_system_reset_request();

        }

        break;

    }

}

static void mv88w8618_pit_reset(DeviceState *d)

{

    mv88w8618_pit_state *s = FROM_SYSBUS(mv88w8618_pit_state,

                                         sysbus_from_qdev(d));

    int i;

    for (i = 0; i < 4; i++) {

        ptimer_stop(s->timer[i].ptimer);

        s->timer[i].limit = 0;

    }

}

static const MemoryRegionOps mv88w8618_pit_ops = {

    .read = mv88w8618_pit_read,

    .write = mv88w8618_pit_write,

    .endianness = DEVICE_NATIVE_ENDIAN,

};

static int mv88w8618_pit_init(SysBusDevice *dev)

{

    mv88w8618_pit_state *s = FROM_SYSBUS(mv88w8618_pit_state, dev);

    int i;

    /* Letting them all run at 1 MHz is likely just a pragmatic

     * simplification. */

    for (i = 0; i < 4; i++) {

        mv88w8618_timer_init(dev, &s->timer[i], 1000000);

    }