/*-
* Copyright (c) 2017 Ruslan Bukin <br@bsdpad.com>
* All rights reserved.
*
* This software was developed by SRI International and the University of
* Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237
* ("CTSRD"), as part of the DARPA CRASH research programme.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Intel Arria 10 FPGA Manager.
* Chapter 4, Arria 10 Hard Processor System Technical Reference Manual.
* Chapter A, FPGA Reconfiguration.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/malloc.h>
#include <sys/rman.h>
#include <sys/timeet.h>
#include <sys/timetc.h>
#include <sys/conf.h>
#include <sys/uio.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/intr.h>
#include <arm/altera/socfpga/socfpga_common.h>
#define FPGAMGR_DCLKCNT 0x8 /* DCLK Count Register */
#define FPGAMGR_DCLKSTAT 0xC /* DCLK Status Register */
#define FPGAMGR_GPO 0x10 /* General-Purpose Output Register */
#define FPGAMGR_GPI 0x14 /* General-Purpose Input Register */
#define FPGAMGR_MISCI 0x18 /* Miscellaneous Input Register */
#define IMGCFG_CTRL_00 0x70
#define S2F_CONDONE_OE (1 << 24)
#define S2F_NSTATUS_OE (1 << 16)
#define CTRL_00_NCONFIG (1 << 8)
#define CTRL_00_NENABLE_CONDONE (1 << 2)
#define CTRL_00_NENABLE_NSTATUS (1 << 1)
#define CTRL_00_NENABLE_NCONFIG (1 << 0)
#define IMGCFG_CTRL_01 0x74
#define CTRL_01_S2F_NCE (1 << 24)
#define CTRL_01_S2F_PR_REQUEST (1 << 16)
#define CTRL_01_S2F_NENABLE_CONFIG (1 << 0)
#define IMGCFG_CTRL_02 0x78
#define CTRL_02_CDRATIO_S 16
#define CTRL_02_CDRATIO_M (0x3 << CTRL_02_CDRATIO_S)
#define CTRL_02_CFGWIDTH_16 (0 << 24)
#define CTRL_02_CFGWIDTH_32 (1 << 24)
#define CTRL_02_EN_CFG_DATA (1 << 8)
#define CTRL_02_EN_CFG_CTRL (1 << 0)
#define IMGCFG_STAT 0x80
#define F2S_PR_ERROR (1 << 11)
#define F2S_PR_DONE (1 << 10)
#define F2S_PR_READY (1 << 9)
#define F2S_MSEL_S 16
#define F2S_MSEL_M (0x7 << F2S_MSEL_S)
#define MSEL_PASSIVE_FAST 0
#define MSEL_PASSIVE_SLOW 1
#define F2S_NCONFIG_PIN (1 << 12)
#define F2S_CONDONE_OE (1 << 7)
#define F2S_NSTATUS_PIN (1 << 4)
#define F2S_CONDONE_PIN (1 << 6)
#define F2S_USERMODE (1 << 2)
struct fpgamgr_a10_softc {
struct resource *res[2];
bus_space_tag_t bst_data;
bus_space_handle_t bsh_data;
struct cdev *mgr_cdev;
device_t dev;
};
static struct resource_spec fpgamgr_a10_spec[] = {
{ SYS_RES_MEMORY, 0, RF_ACTIVE },
{ SYS_RES_MEMORY, 1, RF_ACTIVE },
{ -1, 0 }
};
static int
fpga_wait_dclk_pulses(struct fpgamgr_a10_softc *sc, int npulses)
{
int tout;
/* Clear done bit, if any */
if (READ4(sc, FPGAMGR_DCLKSTAT) != 0)
WRITE4(sc, FPGAMGR_DCLKSTAT, 0x1);
/* Request DCLK pulses */
WRITE4(sc, FPGAMGR_DCLKCNT, npulses);
/* Wait finish */
tout = 1000;
while (tout > 0) {
if (READ4(sc, FPGAMGR_DCLKSTAT) == 1) {
WRITE4(sc, FPGAMGR_DCLKSTAT, 0x1);
break;
}
tout--;
DELAY(10);
}
if (tout == 0) {
device_printf(sc->dev,
"Error: dclkpulses wait timeout\n");
return (1);
}
return (0);
}
static int
fpga_open(struct cdev *dev, int flags __unused,
int fmt __unused, struct thread *td __unused)
{
struct fpgamgr_a10_softc *sc;
int tout;
int msel;
int reg;
sc = dev->si_drv1;
/* Step 1 */
reg = READ4(sc, IMGCFG_STAT);
if ((reg & F2S_USERMODE) == 0) {
device_printf(sc->dev, "Error: invalid mode\n");
return (ENXIO);
};
/* Step 2 */
reg = READ4(sc, IMGCFG_STAT);
msel = (reg & F2S_MSEL_M) >> F2S_MSEL_S;
if ((msel != MSEL_PASSIVE_FAST) && \
(msel != MSEL_PASSIVE_SLOW)) {
device_printf(sc->dev,
"Error: invalid msel %d\n", msel);
return (ENXIO);
};
/*
* Step 3.
* TODO: add support for compressed, encrypted images.
*/
reg = READ4(sc, IMGCFG_CTRL_02);
reg &= ~(CTRL_02_CDRATIO_M);
WRITE4(sc, IMGCFG_CTRL_02, reg);
reg = READ4(sc, IMGCFG_CTRL_02);
reg &= ~CTRL_02_CFGWIDTH_32;
WRITE4(sc, IMGCFG_CTRL_02, reg);
/* Step 4. a */
reg = READ4(sc, IMGCFG_CTRL_01);
reg &= ~CTRL_01_S2F_PR_REQUEST;
WRITE4(sc, IMGCFG_CTRL_01, reg);
reg = READ4(sc, IMGCFG_CTRL_00);
reg |= CTRL_00_NCONFIG;
WRITE4(sc, IMGCFG_CTRL_00, reg);
/* b */
reg = READ4(sc, IMGCFG_CTRL_01);
reg &= ~CTRL_01_S2F_NCE;
WRITE4(sc, IMGCFG_CTRL_01, reg);
/* c */
reg = READ4(sc, IMGCFG_CTRL_02);
reg |= CTRL_02_EN_CFG_CTRL;
WRITE4(sc, IMGCFG_CTRL_02, reg);
/* d */
reg = READ4(sc, IMGCFG_CTRL_00);
reg &= ~S2F_CONDONE_OE;
reg &= ~S2F_NSTATUS_OE;
reg |= CTRL_00_NCONFIG;
reg |= CTRL_00_NENABLE_NSTATUS;
reg |= CTRL_00_NENABLE_CONDONE;
reg &= ~CTRL_00_NENABLE_NCONFIG;
WRITE4(sc, IMGCFG_CTRL_00, reg);
/* Step 5 */
reg = READ4(sc, IMGCFG_CTRL_01);
reg &= ~CTRL_01_S2F_NENABLE_CONFIG;
WRITE4(sc, IMGCFG_CTRL_01, reg);
/* Step 6 */
fpga_wait_dclk_pulses(sc, 0x100);
/* Step 7. a */
reg = READ4(sc, IMGCFG_CTRL_01);
reg |= CTRL_01_S2F_PR_REQUEST;
WRITE4(sc, IMGCFG_CTRL_01, reg);
/* b, c */
fpga_wait_dclk_pulses(sc, 0x7ff);
/* Step 8 */
tout = 10;
while (tout--) {
reg = READ4(sc, IMGCFG_STAT);
if (reg & F2S_PR_ERROR) {
device_printf(sc->dev,
"Error: PR failed on open.\n");
return (ENXIO);
}
if (reg & F2S_PR_READY) {
break;
}
}
if (tout == 0) {
device_printf(sc->dev,
"Error: Timeout waiting PR ready bit.\n");
return (ENXIO);
}
return (0);
}
static int
fpga_close(struct cdev *dev, int flags __unused,
int fmt __unused, struct thread *td __unused)
{
struct fpgamgr_a10_softc *sc;
int tout;
int reg;
sc = dev->si_drv1;
/* Step 10 */
tout = 10;
while (tout--) {
reg = READ4(sc, IMGCFG_STAT);
if (reg & F2S_PR_ERROR) {
device_printf(sc->dev,
"Error: PR failed.\n");
return (ENXIO);
}
if (reg & F2S_PR_DONE) {
break;
}
}
/* Step 11 */
reg = READ4(sc, IMGCFG_CTRL_01);
reg &= ~CTRL_01_S2F_PR_REQUEST;
WRITE4(sc, IMGCFG_CTRL_01, reg);
/* Step 12, 13 */
fpga_wait_dclk_pulses(sc, 0x100);
/* Step 14 */
reg = READ4(sc, IMGCFG_CTRL_02);
reg &= ~CTRL_02_EN_CFG_CTRL;
WRITE4(sc, IMGCFG_CTRL_02, reg);
/* Step 15 */
reg = READ4(sc, IMGCFG_CTRL_01);
reg |= CTRL_01_S2F_NCE;
WRITE4(sc, IMGCFG_CTRL_01, reg);
/* Step 16 */
reg = READ4(sc, IMGCFG_CTRL_01);
reg |= CTRL_01_S2F_NENABLE_CONFIG;
WRITE4(sc, IMGCFG_CTRL_01, reg);
/* Step 17 */
reg = READ4(sc, IMGCFG_STAT);
if ((reg & F2S_USERMODE) == 0) {
device_printf(sc->dev,
"Error: invalid mode\n");
return (ENXIO);
};
if ((reg & F2S_CONDONE_PIN) == 0) {
device_printf(sc->dev,
"Error: configuration not done\n");
return (ENXIO);
};
if ((reg & F2S_NSTATUS_PIN) == 0) {
device_printf(sc->dev,
"Error: nstatus pin\n");
return (ENXIO);
};
return (0);
}
static int
fpga_write(struct cdev *dev, struct uio *uio, int ioflag)
{
struct fpgamgr_a10_softc *sc;
uint32_t buffer;
sc = dev->si_drv1;
/*
* Step 9.
* Device supports 4-byte writes only.
*/
while (uio->uio_resid >= 4) {
uiomove(&buffer, 4, uio);
bus_space_write_4(sc->bst_data, sc->bsh_data,
0x0, buffer);
}
switch (uio->uio_resid) {
case 3:
uiomove(&buffer, 3, uio);
buffer &= 0xffffff;
bus_space_write_4(sc->bst_data, sc->bsh_data,
0x0, buffer);
break;
case 2:
uiomove(&buffer, 2, uio);
buffer &= 0xffff;
bus_space_write_4(sc->bst_data, sc->bsh_data,
0x0, buffer);
break;
case 1:
uiomove(&buffer, 1, uio);
buffer &= 0xff;
bus_space_write_4(sc->bst_data, sc->bsh_data,
0x0, buffer);
break;
default:
break;
};
return (0);
}
static int
fpga_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flags,
struct thread *td)
{
return (0);
}
static struct cdevsw fpga_cdevsw = {
.d_version = D_VERSION,
.d_open = fpga_open,
.d_close = fpga_close,
.d_write = fpga_write,
.d_ioctl = fpga_ioctl,
.d_name = "FPGA Manager",
};
static int
fpgamgr_a10_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (!ofw_bus_is_compatible(dev, "altr,socfpga-a10-fpga-mgr"))
return (ENXIO);
device_set_desc(dev, "Arria 10 FPGA Manager");
return (BUS_PROBE_DEFAULT);
}
static int
fpgamgr_a10_attach(device_t dev)
{
struct fpgamgr_a10_softc *sc;
sc = device_get_softc(dev);
sc->dev = dev;
if (bus_alloc_resources(dev, fpgamgr_a10_spec, sc->res)) {
device_printf(dev, "Could not allocate resources.\n");
return (ENXIO);
}
/* Memory interface */
sc->bst_data = rman_get_bustag(sc->res[1]);
sc->bsh_data = rman_get_bushandle(sc->res[1]);
sc->mgr_cdev = make_dev(&fpga_cdevsw, 0, UID_ROOT, GID_WHEEL,
0600, "fpga%d", device_get_unit(sc->dev));
if (sc->mgr_cdev == NULL) {
device_printf(dev, "Failed to create character device.\n");
return (ENXIO);
}
sc->mgr_cdev->si_drv1 = sc;
return (0);
}
static device_method_t fpgamgr_a10_methods[] = {
DEVMETHOD(device_probe, fpgamgr_a10_probe),
DEVMETHOD(device_attach, fpgamgr_a10_attach),
{ 0, 0 }
};
static driver_t fpgamgr_a10_driver = {
"fpgamgr_a10",
fpgamgr_a10_methods,
sizeof(struct fpgamgr_a10_softc),
};
static devclass_t fpgamgr_a10_devclass;
DRIVER_MODULE(fpgamgr_a10, simplebus, fpgamgr_a10_driver,
fpgamgr_a10_devclass, 0, 0);