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/*
* Exynos4210 Clock Controller Emulation
*
* Copyright (c) 2017 Krzysztof Kozlowski <krzk@kernel.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 of the License, or
* (at your option) any later version.
*
* 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 "qemu/osdep.h"
#include "hw/sysbus.h"
#include "migration/vmstate.h"
#include "qemu/log.h"
#include "qemu/module.h"
#define TYPE_EXYNOS4210_CLK "exynos4210.clk"
#define EXYNOS4210_CLK(obj) \
OBJECT_CHECK(Exynos4210ClkState, (obj), TYPE_EXYNOS4210_CLK)
#define CLK_PLL_LOCKED BIT(29)
#define EXYNOS4210_CLK_REGS_MEM_SIZE 0x15104
typedef struct Exynos4210Reg {
const char *name; /* for debug only */
uint32_t offset;
uint32_t reset_value;
} Exynos4210Reg;
/* Clock controller register base: 0x10030000 */
static const Exynos4210Reg exynos4210_clk_regs[] = {
{"EPLL_LOCK", 0xc010, 0x00000fff},
{"VPLL_LOCK", 0xc020, 0x00000fff},
{"EPLL_CON0", 0xc110, 0x00300301 | CLK_PLL_LOCKED},
{"EPLL_CON1", 0xc114, 0x00000000},
{"VPLL_CON0", 0xc120, 0x00240201 | CLK_PLL_LOCKED},
{"VPLL_CON1", 0xc124, 0x66010464},
{"APLL_LOCK", 0x14000, 0x00000fff},
{"MPLL_LOCK", 0x14004, 0x00000fff},
{"APLL_CON0", 0x14100, 0x00c80601 | CLK_PLL_LOCKED},
{"APLL_CON1", 0x14104, 0x0000001c},
{"MPLL_CON0", 0x14108, 0x00c80601 | CLK_PLL_LOCKED},
{"MPLL_CON1", 0x1410c, 0x0000001c},
};
#define EXYNOS4210_REGS_NUM ARRAY_SIZE(exynos4210_clk_regs)
typedef struct Exynos4210ClkState {
SysBusDevice parent_obj;
MemoryRegion iomem;
uint32_t reg[EXYNOS4210_REGS_NUM];
} Exynos4210ClkState;
static uint64_t exynos4210_clk_read(void *opaque, hwaddr offset,
unsigned size)
{
const Exynos4210ClkState *s = (Exynos4210ClkState *)opaque;
const Exynos4210Reg *regs = exynos4210_clk_regs;
unsigned int i;
for (i = 0; i < EXYNOS4210_REGS_NUM; i++) {
if (regs->offset == offset) {
return s->reg[i];
}
regs++;
}
qemu_log_mask(LOG_GUEST_ERROR, "%s: bad read offset 0x%04x\n",
__func__, (uint32_t)offset);
return 0;
}
static void exynos4210_clk_write(void *opaque, hwaddr offset,
uint64_t val, unsigned size)
{
Exynos4210ClkState *s = (Exynos4210ClkState *)opaque;
const Exynos4210Reg *regs = exynos4210_clk_regs;
unsigned int i;
for (i = 0; i < EXYNOS4210_REGS_NUM; i++) {
if (regs->offset == offset) {
s->reg[i] = val;
return;
}
regs++;
}
qemu_log_mask(LOG_GUEST_ERROR, "%s: bad write offset 0x%04x\n",
__func__, (uint32_t)offset);
}
static const MemoryRegionOps exynos4210_clk_ops = {
.read = exynos4210_clk_read,
.write = exynos4210_clk_write,
.endianness = DEVICE_NATIVE_ENDIAN,
.valid = {
.min_access_size = 4,
.max_access_size = 4,
.unaligned = false
}
};
static void exynos4210_clk_reset(DeviceState *dev)
{
Exynos4210ClkState *s = EXYNOS4210_CLK(dev);
unsigned int i;
/* Set default values for registers */
for (i = 0; i < EXYNOS4210_REGS_NUM; i++) {
s->reg[i] = exynos4210_clk_regs[i].reset_value;
}
}
static void exynos4210_clk_init(Object *obj)
{
Exynos4210ClkState *s = EXYNOS4210_CLK(obj);
SysBusDevice *dev = SYS_BUS_DEVICE(obj);
/* memory mapping */
memory_region_init_io(&s->iomem, obj, &exynos4210_clk_ops, s,
TYPE_EXYNOS4210_CLK, EXYNOS4210_CLK_REGS_MEM_SIZE);
sysbus_init_mmio(dev, &s->iomem);
}
static const VMStateDescription exynos4210_clk_vmstate = {
.name = TYPE_EXYNOS4210_CLK,
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32_ARRAY(reg, Exynos4210ClkState, EXYNOS4210_REGS_NUM),
VMSTATE_END_OF_LIST()
}
};
static void exynos4210_clk_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->reset = exynos4210_clk_reset;
dc->vmsd = &exynos4210_clk_vmstate;
}
static const TypeInfo exynos4210_clk_info = {
.name = TYPE_EXYNOS4210_CLK,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(Exynos4210ClkState),
.instance_init = exynos4210_clk_init,
.class_init = exynos4210_clk_class_init,
};
static void exynos4210_clk_register(void)
{
qemu_log_mask(LOG_GUEST_ERROR, "Clock init\n");
type_register_static(&exynos4210_clk_info);
}
type_init(exynos4210_clk_register)
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