/*
* Aspeed SD Host Controller
* Eddie James <eajames@linux.ibm.com>
*
* Copyright (C) 2019 IBM Corp
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "qemu/osdep.h"
#include "qemu/log.h"
#include "qemu/error-report.h"
#include "hw/sd/aspeed_sdhci.h"
#include "qapi/error.h"
#include "hw/irq.h"
#include "migration/vmstate.h"
#include "hw/qdev-properties.h"
#define ASPEED_SDHCI_INFO 0x00
#define ASPEED_SDHCI_INFO_SLOT1 (1 << 17)
#define ASPEED_SDHCI_INFO_SLOT0 (1 << 16)
#define ASPEED_SDHCI_INFO_RESET (1 << 0)
#define ASPEED_SDHCI_DEBOUNCE 0x04
#define ASPEED_SDHCI_DEBOUNCE_RESET 0x00000005
#define ASPEED_SDHCI_BUS 0x08
#define ASPEED_SDHCI_SDIO_140 0x10
#define ASPEED_SDHCI_SDIO_148 0x18
#define ASPEED_SDHCI_SDIO_240 0x20
#define ASPEED_SDHCI_SDIO_248 0x28
#define ASPEED_SDHCI_WP_POL 0xec
#define ASPEED_SDHCI_CARD_DET 0xf0
#define ASPEED_SDHCI_IRQ_STAT 0xfc
#define TO_REG(addr) ((addr) / sizeof(uint32_t))
static uint64_t aspeed_sdhci_read(void *opaque, hwaddr addr, unsigned int size)
{
uint32_t val = 0;
AspeedSDHCIState *sdhci = opaque;
switch (addr) {
case ASPEED_SDHCI_SDIO_140:
val = (uint32_t)sdhci->slots[0].capareg;
break;
case ASPEED_SDHCI_SDIO_148:
val = (uint32_t)sdhci->slots[0].maxcurr;
break;
case ASPEED_SDHCI_SDIO_240:
val = (uint32_t)sdhci->slots[1].capareg;
break;
case ASPEED_SDHCI_SDIO_248:
val = (uint32_t)sdhci->slots[1].maxcurr;
break;
default:
if (addr < ASPEED_SDHCI_REG_SIZE) {
val = sdhci->regs[TO_REG(addr)];
} else {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Out-of-bounds read at 0x%" HWADDR_PRIx "\n",
__func__, addr);
}
}
return (uint64_t)val;
}
static void aspeed_sdhci_write(void *opaque, hwaddr addr, uint64_t val,
unsigned int size)
{
AspeedSDHCIState *sdhci = opaque;
switch (addr) {
case ASPEED_SDHCI_INFO:
/* The RESET bit automatically clears. */
sdhci->regs[TO_REG(addr)] = (uint32_t)val & ~ASPEED_SDHCI_INFO_RESET;
break;
case ASPEED_SDHCI_SDIO_140:
sdhci->slots[0].capareg = (uint64_t)(uint32_t)val;
break;
case ASPEED_SDHCI_SDIO_148:
sdhci->slots[0].maxcurr = (uint64_t)(uint32_t)val;
break;
case ASPEED_SDHCI_SDIO_240:
sdhci->slots[1].capareg = (uint64_t)(uint32_t)val;
break;
case ASPEED_SDHCI_SDIO_248:
sdhci->slots[1].maxcurr = (uint64_t)(uint32_t)val;
break;
default:
if (addr < ASPEED_SDHCI_REG_SIZE) {
sdhci->regs[TO_REG(addr)] = (uint32_t)val;
} else {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Out-of-bounds write at 0x%" HWADDR_PRIx "\n",
__func__, addr);
}
}
}
static const MemoryRegionOps aspeed_sdhci_ops = {
.read = aspeed_sdhci_read,
.write = aspeed_sdhci_write,
.endianness = DEVICE_NATIVE_ENDIAN,
.valid.min_access_size = 4,
.valid.max_access_size = 4,
};
static void aspeed_sdhci_set_irq(void *opaque, int n, int level)
{
AspeedSDHCIState *sdhci = opaque;
if (level) {
sdhci->regs[TO_REG(ASPEED_SDHCI_IRQ_STAT)] |= BIT(n);
qemu_irq_raise(sdhci->irq);
} else {
sdhci->regs[TO_REG(ASPEED_SDHCI_IRQ_STAT)] &= ~BIT(n);
qemu_irq_lower(sdhci->irq);
}
}
static void aspeed_sdhci_realize(DeviceState *dev, Error **errp)
{
SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
AspeedSDHCIState *sdhci = ASPEED_SDHCI(dev);
/* Create input irqs for the slots */
qdev_init_gpio_in_named_with_opaque(DEVICE(sbd), aspeed_sdhci_set_irq,
sdhci, NULL, sdhci->num_slots);
sysbus_init_irq(sbd, &sdhci->irq);
memory_region_init_io(&sdhci->iomem, OBJECT(sdhci), &aspeed_sdhci_ops,
sdhci, TYPE_ASPEED_SDHCI, 0x1000);
sysbus_init_mmio(sbd, &sdhci->iomem);
for (int i = 0; i < sdhci->num_slots; ++i) {
Object *sdhci_slot = OBJECT(&sdhci->slots[i]);
SysBusDevice *sbd_slot = SYS_BUS_DEVICE(&sdhci->slots[i]);
if (!object_property_set_int(sdhci_slot, "sd-spec-version", 2, errp)) {
return;
}
if (!object_property_set_uint(sdhci_slot, "capareg",
ASPEED_SDHCI_CAPABILITIES, errp)) {
return;
}
if (!sysbus_realize(sbd_slot, errp)) {
return;
}
sysbus_connect_irq(sbd_slot, 0, qdev_get_gpio_in(DEVICE(sbd), i));
memory_region_add_subregion(&sdhci->iomem, (i + 1) * 0x100,
&sdhci->slots[i].iomem);
}
}
static void aspeed_sdhci_reset(DeviceState *dev)
{
AspeedSDHCIState *sdhci = ASPEED_SDHCI(dev);
memset(sdhci->regs, 0, ASPEED_SDHCI_REG_SIZE);
sdhci->regs[TO_REG(ASPEED_SDHCI_INFO)] = ASPEED_SDHCI_INFO_SLOT0;
if (sdhci->num_slots == 2) {
sdhci->regs[TO_REG(ASPEED_SDHCI_INFO)] |= ASPEED_SDHCI_INFO_SLOT1;
}
sdhci->regs[TO_REG(ASPEED_SDHCI_DEBOUNCE)] = ASPEED_SDHCI_DEBOUNCE_RESET;
}
static const VMStateDescription vmstate_aspeed_sdhci = {
.name = TYPE_ASPEED_SDHCI,
.version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32_ARRAY(regs, AspeedSDHCIState, ASPEED_SDHCI_NUM_REGS),
VMSTATE_END_OF_LIST(),
},
};
static Property aspeed_sdhci_properties[] = {
DEFINE_PROP_UINT8("num-slots", AspeedSDHCIState, num_slots, 0),
DEFINE_PROP_END_OF_LIST(),
};
static void aspeed_sdhci_class_init(ObjectClass *classp, void *data)
{
DeviceClass *dc = DEVICE_CLASS(classp);
dc->realize = aspeed_sdhci_realize;
dc->reset = aspeed_sdhci_reset;
dc->vmsd = &vmstate_aspeed_sdhci;
device_class_set_props(dc, aspeed_sdhci_properties);
}
static TypeInfo aspeed_sdhci_info = {
.name = TYPE_ASPEED_SDHCI,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(AspeedSDHCIState),
.class_init = aspeed_sdhci_class_init,
};
static void aspeed_sdhci_register_types(void)
{
type_register_static(&aspeed_sdhci_info);
}
type_init(aspeed_sdhci_register_types)
