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/*
* Allwinner R40 Clock Control Unit emulation
*
* Copyright (C) 2023 qianfan Zhao <qianfanguijin@163.com>
*
* 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 "qemu/units.h"
#include "hw/sysbus.h"
#include "migration/vmstate.h"
#include "qemu/log.h"
#include "qemu/module.h"
#include "hw/misc/allwinner-r40-ccu.h"
/* CCU register offsets */
enum {
REG_PLL_CPUX_CTRL = 0x0000,
REG_PLL_AUDIO_CTRL = 0x0008,
REG_PLL_VIDEO0_CTRL = 0x0010,
REG_PLL_VE_CTRL = 0x0018,
REG_PLL_DDR0_CTRL = 0x0020,
REG_PLL_PERIPH0_CTRL = 0x0028,
REG_PLL_PERIPH1_CTRL = 0x002c,
REG_PLL_VIDEO1_CTRL = 0x0030,
REG_PLL_SATA_CTRL = 0x0034,
REG_PLL_GPU_CTRL = 0x0038,
REG_PLL_MIPI_CTRL = 0x0040,
REG_PLL_DE_CTRL = 0x0048,
REG_PLL_DDR1_CTRL = 0x004c,
REG_AHB1_APB1_CFG = 0x0054,
REG_APB2_CFG = 0x0058,
REG_MMC0_CLK = 0x0088,
REG_MMC1_CLK = 0x008c,
REG_MMC2_CLK = 0x0090,
REG_MMC3_CLK = 0x0094,
REG_USBPHY_CFG = 0x00cc,
REG_PLL_DDR_AUX = 0x00f0,
REG_DRAM_CFG = 0x00f4,
REG_PLL_DDR1_CFG = 0x00f8,
REG_DRAM_CLK_GATING = 0x0100,
REG_GMAC_CLK = 0x0164,
REG_SYS_32K_CLK = 0x0310,
REG_PLL_LOCK_CTRL = 0x0320,
};
#define REG_INDEX(offset) (offset / sizeof(uint32_t))
/* CCU register flags */
enum {
REG_PLL_ENABLE = (1 << 31),
REG_PLL_LOCK = (1 << 28),
};
static uint64_t allwinner_r40_ccu_read(void *opaque, hwaddr offset,
unsigned size)
{
const AwR40ClockCtlState *s = AW_R40_CCU(opaque);
const uint32_t idx = REG_INDEX(offset);
switch (offset) {
case 0x324 ... AW_R40_CCU_IOSIZE:
qemu_log_mask(LOG_GUEST_ERROR, "%s: out-of-bounds offset 0x%04x\n",
__func__, (uint32_t)offset);
return 0;
}
return s->regs[idx];
}
static void allwinner_r40_ccu_write(void *opaque, hwaddr offset,
uint64_t val, unsigned size)
{
AwR40ClockCtlState *s = AW_R40_CCU(opaque);
switch (offset) {
case REG_DRAM_CFG: /* DRAM Configuration(for DDR0) */
/* bit16: SDRCLK_UPD (SDRCLK configuration 0 update) */
val &= ~(1 << 16);
break;
case REG_PLL_DDR1_CTRL: /* DDR1 Control register */
/* bit30: SDRPLL_UPD */
val &= ~(1 << 30);
if (val & REG_PLL_ENABLE) {
val |= REG_PLL_LOCK;
}
break;
case REG_PLL_CPUX_CTRL:
case REG_PLL_AUDIO_CTRL:
case REG_PLL_VE_CTRL:
case REG_PLL_VIDEO0_CTRL:
case REG_PLL_DDR0_CTRL:
case REG_PLL_PERIPH0_CTRL:
case REG_PLL_PERIPH1_CTRL:
case REG_PLL_VIDEO1_CTRL:
case REG_PLL_SATA_CTRL:
case REG_PLL_GPU_CTRL:
case REG_PLL_MIPI_CTRL:
case REG_PLL_DE_CTRL:
if (val & REG_PLL_ENABLE) {
val |= REG_PLL_LOCK;
}
break;
case 0x324 ... AW_R40_CCU_IOSIZE:
qemu_log_mask(LOG_GUEST_ERROR, "%s: out-of-bounds offset 0x%04x\n",
__func__, (uint32_t)offset);
break;
default:
qemu_log_mask(LOG_UNIMP, "%s: unimplemented write offset 0x%04x\n",
__func__, (uint32_t)offset);
break;
}
s->regs[REG_INDEX(offset)] = (uint32_t) val;
}
static const MemoryRegionOps allwinner_r40_ccu_ops = {
.read = allwinner_r40_ccu_read,
.write = allwinner_r40_ccu_write,
.endianness = DEVICE_LITTLE_ENDIAN,
.valid = {
.min_access_size = 4,
.max_access_size = 4,
},
.impl.min_access_size = 4,
};
static void allwinner_r40_ccu_reset(DeviceState *dev)
{
AwR40ClockCtlState *s = AW_R40_CCU(dev);
memset(s->regs, 0, sizeof(s->regs));
/* Set default values for registers */
s->regs[REG_INDEX(REG_PLL_CPUX_CTRL)] = 0x00001000;
s->regs[REG_INDEX(REG_PLL_AUDIO_CTRL)] = 0x00035514;
s->regs[REG_INDEX(REG_PLL_VIDEO0_CTRL)] = 0x03006207;
s->regs[REG_INDEX(REG_PLL_VE_CTRL)] = 0x03006207;
s->regs[REG_INDEX(REG_PLL_DDR0_CTRL)] = 0x00001000,
s->regs[REG_INDEX(REG_PLL_PERIPH0_CTRL)] = 0x00041811;
s->regs[REG_INDEX(REG_PLL_PERIPH1_CTRL)] = 0x00041811;
s->regs[REG_INDEX(REG_PLL_VIDEO1_CTRL)] = 0x03006207;
s->regs[REG_INDEX(REG_PLL_SATA_CTRL)] = 0x00001811;
s->regs[REG_INDEX(REG_PLL_GPU_CTRL)] = 0x03006207;
s->regs[REG_INDEX(REG_PLL_MIPI_CTRL)] = 0x00000515;
s->regs[REG_INDEX(REG_PLL_DE_CTRL)] = 0x03006207;
s->regs[REG_INDEX(REG_PLL_DDR1_CTRL)] = 0x00001800;
s->regs[REG_INDEX(REG_AHB1_APB1_CFG)] = 0x00001010;
s->regs[REG_INDEX(REG_APB2_CFG)] = 0x01000000;
s->regs[REG_INDEX(REG_PLL_DDR_AUX)] = 0x00000001;
s->regs[REG_INDEX(REG_PLL_DDR1_CFG)] = 0x0ccca000;
s->regs[REG_INDEX(REG_SYS_32K_CLK)] = 0x0000000f;
}
static void allwinner_r40_ccu_init(Object *obj)
{
SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
AwR40ClockCtlState *s = AW_R40_CCU(obj);
/* Memory mapping */
memory_region_init_io(&s->iomem, OBJECT(s), &allwinner_r40_ccu_ops, s,
TYPE_AW_R40_CCU, AW_R40_CCU_IOSIZE);
sysbus_init_mmio(sbd, &s->iomem);
}
static const VMStateDescription allwinner_r40_ccu_vmstate = {
.name = "allwinner-r40-ccu",
.version_id = 1,
.minimum_version_id = 1,
.fields = (const VMStateField[]) {
VMSTATE_UINT32_ARRAY(regs, AwR40ClockCtlState, AW_R40_CCU_REGS_NUM),
VMSTATE_END_OF_LIST()
}
};
static void allwinner_r40_ccu_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
device_class_set_legacy_reset(dc, allwinner_r40_ccu_reset);
dc->vmsd = &allwinner_r40_ccu_vmstate;
}
static const TypeInfo allwinner_r40_ccu_info = {
.name = TYPE_AW_R40_CCU,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_init = allwinner_r40_ccu_init,
.instance_size = sizeof(AwR40ClockCtlState),
.class_init = allwinner_r40_ccu_class_init,
};
static void allwinner_r40_ccu_register(void)
{
type_register_static(&allwinner_r40_ccu_info);
}
type_init(allwinner_r40_ccu_register)
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