192 lines
5.3 KiB
C
192 lines
5.3 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*
|
|
* Copyright (c) 2022 Soren Schmidt <sos@deepcore.dk>
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/module.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/rman.h>
|
|
#include <machine/bus.h>
|
|
|
|
#include <dev/ofw/openfirm.h>
|
|
#include <dev/ofw/ofw_bus.h>
|
|
#include <dev/ofw/ofw_bus_subr.h>
|
|
|
|
#include <dev/extres/syscon/syscon.h>
|
|
#include <dev/fdt/simple_mfd.h>
|
|
|
|
#include "rk_otp.h"
|
|
#include "rk_otp_if.h"
|
|
|
|
#define OTPC_SBPI_CTRL 0x0020
|
|
#define SBPI_ENABLE_MASK 0x00010000
|
|
#define SBPI_ENABLE 1
|
|
#define SBPI_DAP_ADDR_MASK 0xff000000
|
|
#define SBPI_DAP_ADDR 0x02
|
|
#define SBPI_DAP_ADDR_SHIFT 8
|
|
#define OTPC_SBPI_CMD_VALID_PRE 0x0024
|
|
#define SBPI_CMD_VALID_MASK 0xffff0000
|
|
#define OTPC_SBPI_INT_STATUS 0x0304
|
|
#define OTPC_SBPI_DONE 2
|
|
#define OTPC_USER_DONE 4
|
|
#define OTPC_USER_CTRL 0x0100
|
|
#define OTPC_USER_MASK 0xffff0000
|
|
#define OTPC_USER 1
|
|
#define OTPC_USER_ADDR 0x0104
|
|
#define OTPC_USER_ADDR_MASK 0xffff0000
|
|
#define OTPC_USER_ENABLE 0x0108
|
|
#define OTPC_USER_FSM_ENABLE_MASK 0xffff0000
|
|
#define OTPC_USER_FSM_ENABLE 1
|
|
#define OTPC_USER_Q 0x0124
|
|
#define OTPC_SBPI_CMD0_OFFSET 0x1000
|
|
#define SBPI_DAP_CMD_WRF 0xc0
|
|
#define SBPI_DAP_REG_ECC 0x3a
|
|
#define OTPC_SBPI_CMD1_OFFSET 0x1004
|
|
#define SBPI_ECC_ENABLE 0x00
|
|
#define SBPI_ECC_DISABLE 0x09
|
|
|
|
|
|
static struct ofw_compat_data compat_data[] = {
|
|
{"rockchip,rk3568-otp", 1},
|
|
{NULL, 0}
|
|
};
|
|
|
|
static struct rk_otp_softc {
|
|
struct resource *mem;
|
|
} rk_otp_sc;
|
|
|
|
|
|
static int
|
|
rk_otp_wait(struct rk_otp_softc *sc, uint32_t status)
|
|
{
|
|
int retry = 10000;
|
|
|
|
while (!(bus_read_4(sc->mem, OTPC_SBPI_INT_STATUS) & status)) {
|
|
DELAY(10);
|
|
if (--retry == 0)
|
|
return (ETIMEDOUT);
|
|
}
|
|
|
|
/* clear status */
|
|
bus_write_4(sc->mem, OTPC_SBPI_INT_STATUS, status);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
rk_otp_ecc(struct rk_otp_softc *sc, int enable)
|
|
{
|
|
bus_write_4(sc->mem, OTPC_SBPI_CTRL,
|
|
SBPI_DAP_ADDR_MASK | (SBPI_DAP_ADDR << SBPI_DAP_ADDR_SHIFT));
|
|
bus_write_4(sc->mem, OTPC_SBPI_CMD_VALID_PRE,
|
|
SBPI_CMD_VALID_MASK | 0x1);
|
|
bus_write_4(sc->mem, OTPC_SBPI_CMD0_OFFSET,
|
|
SBPI_DAP_CMD_WRF | SBPI_DAP_REG_ECC);
|
|
if (enable)
|
|
bus_write_4(sc->mem, OTPC_SBPI_CMD1_OFFSET, SBPI_ECC_ENABLE);
|
|
else
|
|
bus_write_4(sc->mem, OTPC_SBPI_CMD1_OFFSET, SBPI_ECC_DISABLE);
|
|
bus_write_4(sc->mem, OTPC_SBPI_CTRL, SBPI_ENABLE_MASK | SBPI_ENABLE);
|
|
|
|
return (rk_otp_wait(sc, OTPC_SBPI_DONE));
|
|
}
|
|
|
|
int
|
|
rk_otp_read(device_t dev, uint8_t *buffer, int offset, int size)
|
|
{
|
|
struct rk_otp_softc *sc = &rk_otp_sc;
|
|
int error;
|
|
|
|
/* if not initialized just error out */
|
|
if (!sc->mem)
|
|
return (ENXIO);
|
|
|
|
if ((error = rk_otp_ecc(sc, 1))) {
|
|
device_printf(dev, "timeout waiting for OTP ECC status\n");
|
|
return (error);
|
|
}
|
|
|
|
bus_write_4(sc->mem, OTPC_USER_CTRL, OTPC_USER | OTPC_USER_MASK);
|
|
DELAY(5);
|
|
while (size--) {
|
|
bus_write_4(sc->mem, OTPC_USER_ADDR,
|
|
offset++ | OTPC_USER_ADDR_MASK);
|
|
bus_write_4(sc->mem, OTPC_USER_ENABLE,
|
|
OTPC_USER_FSM_ENABLE | OTPC_USER_FSM_ENABLE_MASK);
|
|
|
|
if ((error = rk_otp_wait(sc, OTPC_USER_DONE))) {
|
|
device_printf(dev, "timeout waiting for OTP data\n");
|
|
break;
|
|
}
|
|
*buffer++ = bus_read_4(sc->mem, OTPC_USER_Q);
|
|
}
|
|
bus_write_4(sc->mem, OTPC_USER_CTRL, OTPC_USER_MASK);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
rk_otp_probe(device_t dev)
|
|
{
|
|
|
|
if (!ofw_bus_status_okay(dev))
|
|
return (ENXIO);
|
|
if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
|
|
return (ENXIO);
|
|
device_set_desc(dev, "RockChip OTP");
|
|
return (BUS_PROBE_DEFAULT);
|
|
}
|
|
|
|
static int
|
|
rk_otp_attach(device_t dev)
|
|
{
|
|
struct rk_otp_softc *sc = &rk_otp_sc;
|
|
int rid = 0;
|
|
|
|
sc->mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
|
|
if (!sc->mem) {
|
|
device_printf(dev, "Cannot allocate memory resources\n");
|
|
return (ENXIO);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
|
|
static device_method_t rk_otp_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_probe, rk_otp_probe),
|
|
DEVMETHOD(device_attach, rk_otp_attach),
|
|
|
|
DEVMETHOD_END
|
|
};
|
|
|
|
DEFINE_CLASS_1(rk_otp, rk_otp_driver, rk_otp_methods,
|
|
sizeof(struct simple_mfd_softc), simple_mfd_driver);
|
|
EARLY_DRIVER_MODULE(rk_otp, simplebus, rk_otp_driver, 0, 0,
|
|
BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
|