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/*
* PXA270-based Intel Mainstone platforms.
* FPGA driver
*
* Copyright (c) 2007 by Armin Kuster <akuster@kama-aina.net> or
* <akuster@mvista.com>
*
* 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 "qemu/osdep.h"
#include "hw/hw.h"
#include "hw/sysbus.h"
#include "qemu/module.h"
/* Mainstone FPGA for extern irqs */
#define FPGA_GPIO_PIN 0
#define MST_NUM_IRQS 16
#define MST_LEDDAT1 0x10
#define MST_LEDDAT2 0x14
#define MST_LEDCTRL 0x40
#define MST_GPSWR 0x60
#define MST_MSCWR1 0x80
#define MST_MSCWR2 0x84
#define MST_MSCWR3 0x88
#define MST_MSCRD 0x90
#define MST_INTMSKENA 0xc0
#define MST_INTSETCLR 0xd0
#define MST_PCMCIA0 0xe0
#define MST_PCMCIA1 0xe4
#define MST_PCMCIAx_READY (1 << 10)
#define MST_PCMCIAx_nCD (1 << 5)
#define MST_PCMCIA_CD0_IRQ 9
#define MST_PCMCIA_CD1_IRQ 13
#define TYPE_MAINSTONE_FPGA "mainstone-fpga"
#define MAINSTONE_FPGA(obj) \
OBJECT_CHECK(mst_irq_state, (obj), TYPE_MAINSTONE_FPGA)
typedef struct mst_irq_state{
SysBusDevice parent_obj;
MemoryRegion iomem;
qemu_irq parent;
uint32_t prev_level;
uint32_t leddat1;
uint32_t leddat2;
uint32_t ledctrl;
uint32_t gpswr;
uint32_t mscwr1;
uint32_t mscwr2;
uint32_t mscwr3;
uint32_t mscrd;
uint32_t intmskena;
uint32_t intsetclr;
uint32_t pcmcia0;
uint32_t pcmcia1;
}mst_irq_state;
static void
mst_fpga_set_irq(void *opaque, int irq, int level)
{
mst_irq_state *s = (mst_irq_state *)opaque;
uint32_t oldint = s->intsetclr & s->intmskena;
if (level)
s->prev_level |= 1u << irq;
else
s->prev_level &= ~(1u << irq);
switch(irq) {
case MST_PCMCIA_CD0_IRQ:
if (level)
s->pcmcia0 &= ~MST_PCMCIAx_nCD;
else
s->pcmcia0 |= MST_PCMCIAx_nCD;
break;
case MST_PCMCIA_CD1_IRQ:
if (level)
s->pcmcia1 &= ~MST_PCMCIAx_nCD;
else
s->pcmcia1 |= MST_PCMCIAx_nCD;
break;
}
if ((s->intmskena & (1u << irq)) && level)
s->intsetclr |= 1u << irq;
if (oldint != (s->intsetclr & s->intmskena))
qemu_set_irq(s->parent, s->intsetclr & s->intmskena);
}
static uint64_t
mst_fpga_readb(void *opaque, hwaddr addr, unsigned size)
{
mst_irq_state *s = (mst_irq_state *) opaque;
switch (addr) {
case MST_LEDDAT1:
return s->leddat1;
case MST_LEDDAT2:
return s->leddat2;
case MST_LEDCTRL:
return s->ledctrl;
case MST_GPSWR:
return s->gpswr;
case MST_MSCWR1:
return s->mscwr1;
case MST_MSCWR2:
return s->mscwr2;
case MST_MSCWR3:
return s->mscwr3;
case MST_MSCRD:
return s->mscrd;
case MST_INTMSKENA:
return s->intmskena;
case MST_INTSETCLR:
return s->intsetclr;
case MST_PCMCIA0:
return s->pcmcia0;
case MST_PCMCIA1:
return s->pcmcia1;
default:
printf("Mainstone - mst_fpga_readb: Bad register offset "
"0x" TARGET_FMT_plx "\n", addr);
}
return 0;
}
static void
mst_fpga_writeb(void *opaque, hwaddr addr, uint64_t value,
unsigned size)
{
mst_irq_state *s = (mst_irq_state *) opaque;
value &= 0xffffffff;
switch (addr) {
case MST_LEDDAT1:
s->leddat1 = value;
break;
case MST_LEDDAT2:
s->leddat2 = value;
break;
case MST_LEDCTRL:
s->ledctrl = value;
break;
case MST_GPSWR:
s->gpswr = value;
break;
case MST_MSCWR1:
s->mscwr1 = value;
break;
case MST_MSCWR2:
s->mscwr2 = value;
break;
case MST_MSCWR3:
s->mscwr3 = value;
break;
case MST_MSCRD:
s->mscrd = value;
break;
case MST_INTMSKENA: /* Mask interrupt */
s->intmskena = (value & 0xFEEFF);
qemu_set_irq(s->parent, s->intsetclr & s->intmskena);
break;
case MST_INTSETCLR: /* clear or set interrupt */
s->intsetclr = (value & 0xFEEFF);
qemu_set_irq(s->parent, s->intsetclr & s->intmskena);
break;
/* For PCMCIAx allow the to change only power and reset */
case MST_PCMCIA0:
s->pcmcia0 = (value & 0x1f) | (s->pcmcia0 & ~0x1f);
break;
case MST_PCMCIA1:
s->pcmcia1 = (value & 0x1f) | (s->pcmcia1 & ~0x1f);
break;
default:
printf("Mainstone - mst_fpga_writeb: Bad register offset "
"0x" TARGET_FMT_plx "\n", addr);
}
}
static const MemoryRegionOps mst_fpga_ops = {
.read = mst_fpga_readb,
.write = mst_fpga_writeb,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static int mst_fpga_post_load(void *opaque, int version_id)
{
mst_irq_state *s = (mst_irq_state *) opaque;
qemu_set_irq(s->parent, s->intsetclr & s->intmskena);
return 0;
}
static void mst_fpga_init(Object *obj)
{
DeviceState *dev = DEVICE(obj);
mst_irq_state *s = MAINSTONE_FPGA(obj);
SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
s->pcmcia0 = MST_PCMCIAx_READY | MST_PCMCIAx_nCD;
s->pcmcia1 = MST_PCMCIAx_READY | MST_PCMCIAx_nCD;
sysbus_init_irq(sbd, &s->parent);
/* alloc the external 16 irqs */
qdev_init_gpio_in(dev, mst_fpga_set_irq, MST_NUM_IRQS);
memory_region_init_io(&s->iomem, obj, &mst_fpga_ops, s,
"fpga", 0x00100000);
sysbus_init_mmio(sbd, &s->iomem);
}
static VMStateDescription vmstate_mst_fpga_regs = {
.name = "mainstone_fpga",
.version_id = 0,
.minimum_version_id = 0,
.post_load = mst_fpga_post_load,
.fields = (VMStateField[]) {
VMSTATE_UINT32(prev_level, mst_irq_state),
VMSTATE_UINT32(leddat1, mst_irq_state),
VMSTATE_UINT32(leddat2, mst_irq_state),
VMSTATE_UINT32(ledctrl, mst_irq_state),
VMSTATE_UINT32(gpswr, mst_irq_state),
VMSTATE_UINT32(mscwr1, mst_irq_state),
VMSTATE_UINT32(mscwr2, mst_irq_state),
VMSTATE_UINT32(mscwr3, mst_irq_state),
VMSTATE_UINT32(mscrd, mst_irq_state),
VMSTATE_UINT32(intmskena, mst_irq_state),
VMSTATE_UINT32(intsetclr, mst_irq_state),
VMSTATE_UINT32(pcmcia0, mst_irq_state),
VMSTATE_UINT32(pcmcia1, mst_irq_state),
VMSTATE_END_OF_LIST(),
},
};
static void mst_fpga_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->desc = "Mainstone II FPGA";
dc->vmsd = &vmstate_mst_fpga_regs;
}
static const TypeInfo mst_fpga_info = {
.name = TYPE_MAINSTONE_FPGA,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(mst_irq_state),
.instance_init = mst_fpga_init,
.class_init = mst_fpga_class_init,
};
static void mst_fpga_register_types(void)
{
type_register_static(&mst_fpga_info);
}
type_init(mst_fpga_register_types)
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