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qemu-e2k/hw/misc/mchp_pfsoc_ioscb.c

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/*
* Microchip PolarFire SoC IOSCB 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/sysbus.h"
#include "hw/misc/mchp_pfsoc_ioscb.h"
/*
* The whole IOSCB module registers map into the system address at 0x3000_0000,
* named as "System Port 0 (AXI-D0)".
*/
#define IOSCB_WHOLE_REG_SIZE 0x10000000
#define IOSCB_SUBMOD_REG_SIZE 0x1000
/*
* There are many sub-modules in the IOSCB module.
* See Microchip PolarFire SoC documentation (Register_Map.zip),
* Register Map/PF_SoC_RegMap_V1_1/MPFS250T/mpfs250t_ioscb_memmap_dri.htm
*
* The following are sub-modules offsets that are of concern.
*/
#define IOSCB_LANE01_BASE 0x06500000
#define IOSCB_LANE23_BASE 0x06510000
#define IOSCB_CTRL_BASE 0x07020000
#define IOSCB_CFG_BASE 0x07080000
#define IOSCB_PLL_MSS_BASE 0x0E001000
#define IOSCB_CFM_MSS_BASE 0x0E002000
#define IOSCB_PLL_DDR_BASE 0x0E010000
#define IOSCB_BC_DDR_BASE 0x0E020000
#define IOSCB_IO_CALIB_DDR_BASE 0x0E040000
#define IOSCB_PLL_SGMII_BASE 0x0E080000
#define IOSCB_DLL_SGMII_BASE 0x0E100000
#define IOSCB_CFM_SGMII_BASE 0x0E200000
#define IOSCB_BC_SGMII_BASE 0x0E400000
#define IOSCB_IO_CALIB_SGMII_BASE 0x0E800000
static uint64_t mchp_pfsoc_dummy_read(void *opaque, hwaddr offset,
unsigned size)
{
qemu_log_mask(LOG_UNIMP, "%s: unimplemented device read "
"(size %d, offset 0x%" HWADDR_PRIx ")\n",
__func__, size, offset);
return 0;
}
static void mchp_pfsoc_dummy_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_dummy_ops = {
.read = mchp_pfsoc_dummy_read,
.write = mchp_pfsoc_dummy_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
/* All PLL modules in IOSCB have the same register layout */
#define PLL_CTRL 0x04
static uint64_t mchp_pfsoc_pll_read(void *opaque, hwaddr offset,
unsigned size)
{
uint32_t val = 0;
switch (offset) {
case PLL_CTRL:
/* PLL is locked */
val = BIT(25);
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 const MemoryRegionOps mchp_pfsoc_pll_ops = {
.read = mchp_pfsoc_pll_read,
.write = mchp_pfsoc_dummy_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
/* IO_CALIB_DDR submodule */
#define IO_CALIB_DDR_IOC_REG1 0x08
static uint64_t mchp_pfsoc_io_calib_ddr_read(void *opaque, hwaddr offset,
unsigned size)
{
uint32_t val = 0;
switch (offset) {
case IO_CALIB_DDR_IOC_REG1:
/* calibration completed */
val = BIT(2);
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 const MemoryRegionOps mchp_pfsoc_io_calib_ddr_ops = {
.read = mchp_pfsoc_io_calib_ddr_read,
.write = mchp_pfsoc_dummy_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static void mchp_pfsoc_ioscb_realize(DeviceState *dev, Error **errp)
{
MchpPfSoCIoscbState *s = MCHP_PFSOC_IOSCB(dev);
SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
memory_region_init(&s->container, OBJECT(s),
"mchp.pfsoc.ioscb", IOSCB_WHOLE_REG_SIZE);
sysbus_init_mmio(sbd, &s->container);
/* add subregions for all sub-modules in IOSCB */
memory_region_init_io(&s->lane01, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
"mchp.pfsoc.ioscb.lane01", IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_LANE01_BASE, &s->lane01);
memory_region_init_io(&s->lane23, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
"mchp.pfsoc.ioscb.lane23", IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_LANE23_BASE, &s->lane23);
memory_region_init_io(&s->ctrl, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
"mchp.pfsoc.ioscb.ctrl", IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_CTRL_BASE, &s->ctrl);
memory_region_init_io(&s->cfg, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
"mchp.pfsoc.ioscb.cfg", IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_CFG_BASE, &s->cfg);
memory_region_init_io(&s->pll_mss, OBJECT(s), &mchp_pfsoc_pll_ops, s,
"mchp.pfsoc.ioscb.pll_mss", IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_PLL_MSS_BASE, &s->pll_mss);
memory_region_init_io(&s->cfm_mss, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
"mchp.pfsoc.ioscb.cfm_mss", IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_CFM_MSS_BASE, &s->cfm_mss);
memory_region_init_io(&s->pll_ddr, OBJECT(s), &mchp_pfsoc_pll_ops, s,
"mchp.pfsoc.ioscb.pll_ddr", IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_PLL_DDR_BASE, &s->pll_ddr);
memory_region_init_io(&s->bc_ddr, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
"mchp.pfsoc.ioscb.bc_ddr", IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_BC_DDR_BASE, &s->bc_ddr);
memory_region_init_io(&s->io_calib_ddr, OBJECT(s),
&mchp_pfsoc_io_calib_ddr_ops, s,
"mchp.pfsoc.ioscb.io_calib_ddr",
IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_IO_CALIB_DDR_BASE,
&s->io_calib_ddr);
memory_region_init_io(&s->pll_sgmii, OBJECT(s), &mchp_pfsoc_pll_ops, s,
"mchp.pfsoc.ioscb.pll_sgmii", IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_PLL_SGMII_BASE,
&s->pll_sgmii);
memory_region_init_io(&s->dll_sgmii, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
"mchp.pfsoc.ioscb.dll_sgmii", IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_DLL_SGMII_BASE,
&s->dll_sgmii);
memory_region_init_io(&s->cfm_sgmii, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
"mchp.pfsoc.ioscb.cfm_sgmii", IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_CFM_SGMII_BASE,
&s->cfm_sgmii);
memory_region_init_io(&s->bc_sgmii, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
"mchp.pfsoc.ioscb.bc_sgmii", IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_BC_SGMII_BASE,
&s->bc_sgmii);
memory_region_init_io(&s->io_calib_sgmii, OBJECT(s), &mchp_pfsoc_dummy_ops,
s, "mchp.pfsoc.ioscb.io_calib_sgmii",
IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_IO_CALIB_SGMII_BASE,
&s->io_calib_sgmii);
}
static void mchp_pfsoc_ioscb_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->desc = "Microchip PolarFire SoC IOSCB modules";
dc->realize = mchp_pfsoc_ioscb_realize;
}
static const TypeInfo mchp_pfsoc_ioscb_info = {
.name = TYPE_MCHP_PFSOC_IOSCB,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(MchpPfSoCIoscbState),
.class_init = mchp_pfsoc_ioscb_class_init,
};
static void mchp_pfsoc_ioscb_register_types(void)
{
type_register_static(&mchp_pfsoc_ioscb_info);
}
type_init(mchp_pfsoc_ioscb_register_types)
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