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/*
* Microchip PolarFire SoC DDR Memory Controller module emulation
*
* Copyright (c) 2020 Wind River Systems, Inc.
*
* Author:
* Bin Meng <bin.meng@windriver.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 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 "qemu/osdep.h"
#include "qemu/bitops.h"
#include "qemu/log.h"
#include "qapi/error.h"
#include "hw/hw.h"
#include "hw/sysbus.h"
#include "hw/misc/mchp_pfsoc_dmc.h"
/* DDR SGMII PHY module */
#define SGMII_PHY_IOC_REG1 0x208
#define SGMII_PHY_TRAINING_STATUS 0x814
#define SGMII_PHY_DQ_DQS_ERR_DONE 0x834
#define SGMII_PHY_DQDQS_STATUS1 0x84c
#define SGMII_PHY_PVT_STAT 0xc20
static uint64_t mchp_pfsoc_ddr_sgmii_phy_read(void *opaque, hwaddr offset,
unsigned size)
{
uint32_t val = 0;
static int training_status_bit;
switch (offset) {
case SGMII_PHY_IOC_REG1:
/* See ddr_pvt_calibration() in HSS */
val = BIT(4) | BIT(2);
break;
case SGMII_PHY_TRAINING_STATUS:
/*
* The codes logic emulates the training status change from
* DDR_TRAINING_IP_SM_BCLKSCLK to DDR_TRAINING_IP_SM_DQ_DQS.
*
* See ddr_setup() in mss_ddr.c in the HSS source codes.
*/
val = 1 << training_status_bit;
training_status_bit = (training_status_bit + 1) % 5;
break;
case SGMII_PHY_DQ_DQS_ERR_DONE:
/*
* DDR_TRAINING_IP_SM_VERIFY state in ddr_setup(),
* check that DQ/DQS training passed without error.
*/
val = 8;
break;
case SGMII_PHY_DQDQS_STATUS1:
/*
* DDR_TRAINING_IP_SM_VERIFY state in ddr_setup(),
* check that DQ/DQS calculated window is above 5 taps.
*/
val = 0xff;
break;
case SGMII_PHY_PVT_STAT:
/* See sgmii_channel_setup() in HSS */
val = BIT(14) | BIT(6);
break;
default:
qemu_log_mask(LOG_UNIMP, "%s: unimplemented device read "
"(size %d, offset 0x%" HWADDR_PRIx ")\n",
__func__, size, offset);
break;
}
return val;
}
static void mchp_pfsoc_ddr_sgmii_phy_write(void *opaque, hwaddr offset,
uint64_t value, unsigned size)
{
qemu_log_mask(LOG_UNIMP, "%s: unimplemented device write "
"(size %d, value 0x%" PRIx64
", offset 0x%" HWADDR_PRIx ")\n",
__func__, size, value, offset);
}
static const MemoryRegionOps mchp_pfsoc_ddr_sgmii_phy_ops = {
.read = mchp_pfsoc_ddr_sgmii_phy_read,
.write = mchp_pfsoc_ddr_sgmii_phy_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static void mchp_pfsoc_ddr_sgmii_phy_realize(DeviceState *dev, Error **errp)
{
MchpPfSoCDdrSgmiiPhyState *s = MCHP_PFSOC_DDR_SGMII_PHY(dev);
memory_region_init_io(&s->sgmii_phy, OBJECT(dev),
&mchp_pfsoc_ddr_sgmii_phy_ops, s,
"mchp.pfsoc.ddr_sgmii_phy",
MCHP_PFSOC_DDR_SGMII_PHY_REG_SIZE);
sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->sgmii_phy);
}
static void mchp_pfsoc_ddr_sgmii_phy_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->desc = "Microchip PolarFire SoC DDR SGMII PHY module";
dc->realize = mchp_pfsoc_ddr_sgmii_phy_realize;
}
static const TypeInfo mchp_pfsoc_ddr_sgmii_phy_info = {
.name = TYPE_MCHP_PFSOC_DDR_SGMII_PHY,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(MchpPfSoCDdrSgmiiPhyState),
.class_init = mchp_pfsoc_ddr_sgmii_phy_class_init,
};
static void mchp_pfsoc_ddr_sgmii_phy_register_types(void)
{
type_register_static(&mchp_pfsoc_ddr_sgmii_phy_info);
}
type_init(mchp_pfsoc_ddr_sgmii_phy_register_types)
/* DDR CFG module */
#define CFG_MT_DONE_ACK 0x4428
#define CFG_STAT_DFI_INIT_COMPLETE 0x10034
#define CFG_STAT_DFI_TRAINING_COMPLETE 0x10038
static uint64_t mchp_pfsoc_ddr_cfg_read(void *opaque, hwaddr offset,
unsigned size)
{
uint32_t val = 0;
switch (offset) {
case CFG_MT_DONE_ACK:
/* memory test in MTC_test() */
val = BIT(0);
break;
case CFG_STAT_DFI_INIT_COMPLETE:
/* DDR_TRAINING_IP_SM_START_CHECK state in ddr_setup() */
val = BIT(0);
break;
case CFG_STAT_DFI_TRAINING_COMPLETE:
/* DDR_TRAINING_IP_SM_VERIFY state in ddr_setup() */
val = BIT(0);
break;
default:
qemu_log_mask(LOG_UNIMP, "%s: unimplemented device read "
"(size %d, offset 0x%" HWADDR_PRIx ")\n",
__func__, size, offset);
break;
}
return val;
}
static void mchp_pfsoc_ddr_cfg_write(void *opaque, hwaddr offset,
uint64_t value, unsigned size)
{
qemu_log_mask(LOG_UNIMP, "%s: unimplemented device write "
"(size %d, value 0x%" PRIx64
", offset 0x%" HWADDR_PRIx ")\n",
__func__, size, value, offset);
}
static const MemoryRegionOps mchp_pfsoc_ddr_cfg_ops = {
.read = mchp_pfsoc_ddr_cfg_read,
.write = mchp_pfsoc_ddr_cfg_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static void mchp_pfsoc_ddr_cfg_realize(DeviceState *dev, Error **errp)
{
MchpPfSoCDdrCfgState *s = MCHP_PFSOC_DDR_CFG(dev);
memory_region_init_io(&s->cfg, OBJECT(dev),
&mchp_pfsoc_ddr_cfg_ops, s,
"mchp.pfsoc.ddr_cfg",
MCHP_PFSOC_DDR_CFG_REG_SIZE);
sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->cfg);
}
static void mchp_pfsoc_ddr_cfg_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->desc = "Microchip PolarFire SoC DDR CFG module";
dc->realize = mchp_pfsoc_ddr_cfg_realize;
}
static const TypeInfo mchp_pfsoc_ddr_cfg_info = {
.name = TYPE_MCHP_PFSOC_DDR_CFG,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(MchpPfSoCDdrCfgState),
.class_init = mchp_pfsoc_ddr_cfg_class_init,
};
static void mchp_pfsoc_ddr_cfg_register_types(void)
{
type_register_static(&mchp_pfsoc_ddr_cfg_info);
}
type_init(mchp_pfsoc_ddr_cfg_register_types)
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