Archipelago » qemu

/*

 * Copyright (c) 2006-2008 Openedhand Ltd.

 * Written by Andrzej Zaborowski <balrog@zabor.org>

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License as

 * published by the Free Software Foundation; either version 2 or

 * (at your option) version 3 of the License.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License along

 * with this program; if not, see <http://www.gnu.org/licenses/>.

 */

#include "hw.h"

#include "sharpsl.h"

#include "sysbus.h"

#undef REG_FMT

#define REG_FMT                        "0x%02lx"

/* SCOOP devices */

typedef struct ScoopInfo ScoopInfo;

struct ScoopInfo {

    SysBusDevice busdev;

    qemu_irq handler[16];

    MemoryRegion iomem;

    uint16_t status;

    uint16_t power;

    uint32_t gpio_level;

    uint32_t gpio_dir;

    uint32_t prev_level;

    uint16_t mcr;

    uint16_t cdr;

    uint16_t ccr;

    uint16_t irr;

    uint16_t imr;

    uint16_t isr;

};

#define SCOOP_MCR        0x00

#define SCOOP_CDR        0x04

#define SCOOP_CSR        0x08

#define SCOOP_CPR        0x0c

#define SCOOP_CCR        0x10

#define SCOOP_IRR_IRM        0x14

#define SCOOP_IMR        0x18

#define SCOOP_ISR        0x1c

#define SCOOP_GPCR        0x20

#define SCOOP_GPWR        0x24

#define SCOOP_GPRR        0x28

static inline void scoop_gpio_handler_update(ScoopInfo *s) {

    uint32_t level, diff;

    int bit;

    level = s->gpio_level & s->gpio_dir;

    for (diff = s->prev_level ^ level; diff; diff ^= 1 << bit) {

        bit = ffs(diff) - 1;

        qemu_set_irq(s->handler[bit], (level >> bit) & 1);

    }

    s->prev_level = level;

}

static uint64_t scoop_read(void *opaque, target_phys_addr_t addr,

                           unsigned size)

{

    ScoopInfo *s = (ScoopInfo *) opaque;

    switch (addr & 0x3f) {

    case SCOOP_MCR:

        return s->mcr;

    case SCOOP_CDR:

        return s->cdr;

    case SCOOP_CSR:

        return s->status;

    case SCOOP_CPR:

        return s->power;

    case SCOOP_CCR:

        return s->ccr;

    case SCOOP_IRR_IRM:

        return s->irr;

    case SCOOP_IMR:

        return s->imr;

    case SCOOP_ISR:

        return s->isr;

    case SCOOP_GPCR:

        return s->gpio_dir;

    case SCOOP_GPWR:

    case SCOOP_GPRR:

        return s->gpio_level;

    default:

        zaurus_printf("Bad register offset " REG_FMT "\n", (unsigned long)addr);

    }

    return 0;

}

static void scoop_write(void *opaque, target_phys_addr_t addr,

                        uint64_t value, unsigned size)

{

    ScoopInfo *s = (ScoopInfo *) opaque;

    value &= 0xffff;

    switch (addr & 0x3f) {

    case SCOOP_MCR:

        s->mcr = value;

        break;

    case SCOOP_CDR:

        s->cdr = value;

        break;

    case SCOOP_CPR:

        s->power = value;

        if (value & 0x80)

            s->power |= 0x8040;

        break;

    case SCOOP_CCR:

        s->ccr = value;

        break;

    case SCOOP_IRR_IRM:

        s->irr = value;

        break;

    case SCOOP_IMR:

        s->imr = value;

        break;

    case SCOOP_ISR:

        s->isr = value;

        break;

    case SCOOP_GPCR:

        s->gpio_dir = value;

        scoop_gpio_handler_update(s);

        break;

    case SCOOP_GPWR:

    case SCOOP_GPRR:        /* GPRR is probably R/O in real HW */

        s->gpio_level = value & s->gpio_dir;

        scoop_gpio_handler_update(s);

        break;

    default:

        zaurus_printf("Bad register offset " REG_FMT "\n", (unsigned long)addr);

    }

}

static const MemoryRegionOps scoop_ops = {

    .read = scoop_read,

    .write = scoop_write,

    .endianness = DEVICE_NATIVE_ENDIAN,

};

static void scoop_gpio_set(void *opaque, int line, int level)

{

    ScoopInfo *s = (ScoopInfo *) opaque;

    if (level)

        s->gpio_level |= (1 << line);

    else

        s->gpio_level &= ~(1 << line);

}

static int scoop_init(SysBusDevice *dev)

{

    ScoopInfo *s = FROM_SYSBUS(ScoopInfo, dev);

    s->status = 0x02;

    qdev_init_gpio_out(&s->busdev.qdev, s->handler, 16);

    qdev_init_gpio_in(&s->busdev.qdev, scoop_gpio_set, 16);

    memory_region_init_io(&s->iomem, &scoop_ops, s, "scoop", 0x1000);

    sysbus_init_mmio(dev, &s->iomem);

    return 0;

}

static int scoop_post_load(void *opaque, int version_id)

{

    ScoopInfo *s = (ScoopInfo *) opaque;

    int i;

    uint32_t level;

    level = s->gpio_level & s->gpio_dir;

    for (i = 0; i < 16; i++) {

        qemu_set_irq(s->handler[i], (level >> i) & 1);

    }

    s->prev_level = level;

    return 0;

}

static bool is_version_0 (void *opaque, int version_id)

{

    return version_id == 0;

}

static const VMStateDescription vmstate_scoop_regs = {

    .name = "scoop",

    .version_id = 1,

    .minimum_version_id = 0,

    .minimum_version_id_old = 0,

    .post_load = scoop_post_load,

    .fields = (VMStateField []) {

        VMSTATE_UINT16(status, ScoopInfo),

        VMSTATE_UINT16(power, ScoopInfo),

        VMSTATE_UINT32(gpio_level, ScoopInfo),

        VMSTATE_UINT32(gpio_dir, ScoopInfo),

        VMSTATE_UINT32(prev_level, ScoopInfo),

        VMSTATE_UINT16(mcr, ScoopInfo),

        VMSTATE_UINT16(cdr, ScoopInfo),

        VMSTATE_UINT16(ccr, ScoopInfo),

        VMSTATE_UINT16(irr, ScoopInfo),

        VMSTATE_UINT16(imr, ScoopInfo),

        VMSTATE_UINT16(isr, ScoopInfo),

        VMSTATE_UNUSED_TEST(is_version_0, 2),

        VMSTATE_END_OF_LIST(),

    },

};

static Property scoop_sysbus_properties[] = {

    DEFINE_PROP_END_OF_LIST(),

};

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

{

    DeviceClass *dc = DEVICE_CLASS(klass);

    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);

    k->init = scoop_init;

    dc->desc = "Scoop2 Sharp custom ASIC";

    dc->vmsd = &vmstate_scoop_regs;

    dc->props = scoop_sysbus_properties;

}

static TypeInfo scoop_sysbus_info = {

    .name          = "scoop",

    .parent        = TYPE_SYS_BUS_DEVICE,

    .instance_size = sizeof(ScoopInfo),

    .class_init    = scoop_sysbus_class_init,

};

static void scoop_register_types(void)

{

    type_register_static(&scoop_sysbus_info);

}

type_init(scoop_register_types)

/* Write the bootloader parameters memory area.  */

#define MAGIC_CHG(a, b, c, d)        ((d << 24) | (c << 16) | (b << 8) | a)

static struct QEMU_PACKED sl_param_info {

    uint32_t comadj_keyword;

    int32_t comadj;

    uint32_t uuid_keyword;

    char uuid[16];

    uint32_t touch_keyword;

    int32_t touch_xp;

    int32_t touch_yp;

    int32_t touch_xd;

    int32_t touch_yd;

    uint32_t adadj_keyword;

    int32_t adadj;

    uint32_t phad_keyword;

    int32_t phadadj;

} zaurus_bootparam = {

    .comadj_keyword        = MAGIC_CHG('C', 'M', 'A', 'D'),

    .comadj                = 125,

    .uuid_keyword        = MAGIC_CHG('U', 'U', 'I', 'D'),

    .uuid                = { -1 },

    .touch_keyword        = MAGIC_CHG('T', 'U', 'C', 'H'),

    .touch_xp                = -1,

    .adadj_keyword        = MAGIC_CHG('B', 'V', 'A', 'D'),

    .adadj                = -1,

    .phad_keyword        = MAGIC_CHG('P', 'H', 'A', 'D'),

    .phadadj                = 0x01,

};

void sl_bootparam_write(target_phys_addr_t ptr)

{

    cpu_physical_memory_write(ptr, (void *)&zaurus_bootparam,

                              sizeof(struct sl_param_info));

}