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arm64: rockchip: Add pinctrl driver
Add pinctrl driver for RockChip SoCs. This device manage which function to set on which pin and some other properties like pull up/down, drive strength etc ... For now the driver only support RK3328 but it is versatile enough to add support for other RockChip SoC in the future.
This commit is contained in:
Emmanuel Vadot
parent
49755fc6d2
commit
be2e72c286
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=333038
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@ -445,6 +445,7 @@ MAN= aac.4 \
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rgephy.4 \
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rights.4 \
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${_rk_grf.4} \
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${_rk_pinctrl.4} \
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rl.4 \
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rndtest.4 \
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route.4 \
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@ -767,6 +768,7 @@ MLINKS+=xl.4 if_xl.4
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.if ${MACHINE_CPUARCH} == "aarch64"
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_armv8crypto.4= armv8crypto.4
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_rk_grf.4= rk_grf.4
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_rk_pinctrl.4= rk_pinctrl.4
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.endif
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.if ${MACHINE_CPUARCH} == "arm" || ${MACHINE_CPUARCH} == "aarch64"
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62
share/man/man4/rk_pinctrl.4
Normal file
62
share/man/man4/rk_pinctrl.4
Normal file
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@ -0,0 +1,62 @@
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.\"-
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.\" Copyright (c) 2018 Emmanuel Vadot <manu@freebsd.org>
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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||||
.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd Apr 26, 2018
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.Dt RK_PINCTRL 4
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.Os
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.Sh NAME
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.Nm rk_pinctrl
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.Nd driver for the pin multiplexing on RockChip SoCs
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.Sh SYNOPSIS
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.Cd "options SOC_ROCKCHIP_RK3328"
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.Sh DESCRIPTION
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The
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.Nm
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device driver provides support for the pin multiplexing device present
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on RockChip SoC.
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.Sh HARDWARE
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The current version of the
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.Nm
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driver supports the pin controller with one of the following
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compatible strings :
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.Pp
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.Bl -bullet -compact
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.It
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rockchip,rk3328-pinctrl
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.El
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.Sh SEE ALSO
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.Xr fdt_pinctrl 4 ,
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.Sh HISTORY
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The
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.Nm
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device driver first appeared in
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.Fx 12.0 .
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.Sh AUTHORS
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The
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.Nm
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device driver and manpage was written by
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.An Emmanuel Vadot Aq Mt manu@freebsd.org .
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475
sys/arm64/rockchip/rk_pinctrl.c
Normal file
475
sys/arm64/rockchip/rk_pinctrl.c
Normal file
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@ -0,0 +1,475 @@
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/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2018 Emmanuel Vadot <manu@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/rman.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <machine/intr.h>
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#include <dev/fdt/simplebus.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <dev/fdt/fdt_pinctrl.h>
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#include <dev/extres/syscon/syscon.h>
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#include "syscon_if.h"
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#include "opt_soc.h"
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struct rk_pinctrl_pin_drive {
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uint32_t value;
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uint32_t ma;
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};
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struct rk_pinctrl_bank {
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uint32_t bank_num;
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uint32_t subbank_num;
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uint32_t offset;
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uint32_t nbits;
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};
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struct rk_pinctrl_pin_fixup {
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uint32_t bank;
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uint32_t subbank;
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uint32_t pin;
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uint32_t reg;
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uint32_t bit;
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uint32_t mask;
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};
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struct rk_pinctrl_conf {
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struct rk_pinctrl_bank *iomux_conf;
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uint32_t iomux_nbanks;
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struct rk_pinctrl_pin_fixup *pin_fixup;
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uint32_t npin_fixup;
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struct rk_pinctrl_pin_drive *pin_drive;
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uint32_t npin_drive;
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uint32_t pd_offset;
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uint32_t drive_offset;
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};
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struct rk_pinctrl_softc {
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struct simplebus_softc simplebus_sc;
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device_t dev;
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struct syscon *grf;
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struct rk_pinctrl_conf *conf;
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};
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static struct rk_pinctrl_bank rk3328_iomux_bank[] = {
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{
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.bank_num = 0,
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.subbank_num = 0,
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.offset = 0x00,
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.nbits = 2,
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},
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{
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.bank_num = 0,
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.subbank_num = 1,
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.offset = 0x04,
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.nbits = 2,
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},
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{
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.bank_num = 0,
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.subbank_num = 2,
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.offset = 0x08,
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.nbits = 2,
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},
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{
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.bank_num = 0,
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.subbank_num = 3,
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.offset = 0xc,
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.nbits = 2,
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},
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{
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.bank_num = 1,
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.subbank_num = 0,
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.offset = 0x10,
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.nbits = 2,
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},
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{
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.bank_num = 1,
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.subbank_num = 1,
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.offset = 0x14,
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.nbits = 2,
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},
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{
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.bank_num = 1,
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.subbank_num = 2,
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.offset = 0x18,
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.nbits = 2,
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},
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{
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.bank_num = 1,
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.subbank_num = 3,
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.offset = 0x1C,
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.nbits = 2,
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},
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{
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.bank_num = 2,
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.subbank_num = 0,
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.offset = 0x20,
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.nbits = 2,
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},
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{
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.bank_num = 2,
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.subbank_num = 1,
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.offset = 0x24,
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.nbits = 3,
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},
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{
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.bank_num = 2,
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.subbank_num = 2,
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.offset = 0x2c,
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.nbits = 3,
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},
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{
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.bank_num = 2,
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.subbank_num = 3,
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.offset = 0x34,
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.nbits = 2,
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},
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{
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.bank_num = 3,
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.subbank_num = 0,
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.offset = 0x38,
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.nbits = 3,
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},
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{
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.bank_num = 3,
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.subbank_num = 1,
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.offset = 0x40,
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.nbits = 3,
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},
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{
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.bank_num = 3,
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.subbank_num = 2,
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.offset = 0x48,
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.nbits = 3,
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},
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{
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.bank_num = 3,
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.subbank_num = 3,
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.offset = 0x4c,
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.nbits = 3,
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},
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};
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static struct rk_pinctrl_pin_fixup rk3328_pin_fixup[] = {
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{
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.bank = 2,
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.pin = 12,
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.reg = 0x24,
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.bit = 8,
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.mask = 0x300,
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},
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{
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.bank = 2,
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.pin = 15,
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.reg = 0x28,
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.bit = 0,
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.mask = 0x7,
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},
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{
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.bank = 2,
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.pin = 23,
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.reg = 0x30,
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.bit = 14,
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.mask = 0x6000,
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},
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};
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static struct rk_pinctrl_pin_drive rk3328_pin_drive[] = {
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{
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.value = 0,
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.ma = 2,
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},
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{
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.value = 1,
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.ma = 4,
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},
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{
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.value = 2,
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.ma = 8,
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},
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{
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.value = 3,
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.ma = 12,
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},
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};
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struct rk_pinctrl_conf rk3328_conf = {
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.iomux_conf = rk3328_iomux_bank,
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.iomux_nbanks = nitems(rk3328_iomux_bank),
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.pin_fixup = rk3328_pin_fixup,
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.npin_fixup = nitems(rk3328_pin_fixup),
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.pin_drive = rk3328_pin_drive,
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.npin_drive = nitems(rk3328_pin_drive),
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.pd_offset = 0x100,
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.drive_offset = 0x200,
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};
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static struct ofw_compat_data compat_data[] = {
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#ifdef SOC_ROCKCHIP_RK3328
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{"rockchip,rk3328-pinctrl", (uintptr_t)&rk3328_conf},
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#endif
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{NULL, 0}
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};
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static int
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rk_pinctrl_parse_bias(phandle_t node)
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{
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if (OF_hasprop(node, "bias-disable"))
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return (0);
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if (OF_hasprop(node, "bias-pull-up"))
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return (1);
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if (OF_hasprop(node, "bias-pull-down"))
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return (2);
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return (-1);
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}
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static int rk_pinctrl_parse_drive(struct rk_pinctrl_softc *sc, phandle_t node,
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uint32_t *drive)
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{
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uint32_t value;
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int i;
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if (OF_getencprop(node, "drive-strength", &value,
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sizeof(value)) != 0)
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return (-1);
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/* Map to the correct drive value */
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for (i = 0; i < sc->conf->npin_drive; i++)
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if (sc->conf->pin_drive[i].ma == value) {
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*drive = sc->conf->pin_drive[i].value;
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return (0);
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}
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return (-1);
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}
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static void
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rk_pinctrl_get_fixup(struct rk_pinctrl_softc *sc, uint32_t bank, uint32_t pin,
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uint32_t *reg, uint32_t *mask, uint32_t *bit)
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{
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int i;
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for (i = 0; i < sc->conf->npin_fixup; i++)
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if (sc->conf->pin_fixup[i].bank == bank &&
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sc->conf->pin_fixup[i].pin == pin) {
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*reg = sc->conf->pin_fixup[i].reg;
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*mask = sc->conf->pin_fixup[i].mask;
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*bit = sc->conf->pin_fixup[i].bit;
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return;
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}
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}
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static void
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rk_pinctrl_configure_pin(struct rk_pinctrl_softc *sc, uint32_t *pindata)
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{
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phandle_t pin_conf;
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uint32_t bank, subbank, pin, function, bias;
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uint32_t bit, mask, reg, drive;
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int i;
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bank = pindata[0];
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pin = pindata[1];
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function = pindata[2];
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pin_conf = OF_node_from_xref(pindata[3]);
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subbank = pin / 8;
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for (i = 0; i < sc->conf->iomux_nbanks; i++)
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if (sc->conf->iomux_conf[i].bank_num == bank &&
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sc->conf->iomux_conf[i].subbank_num == subbank)
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break;
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if (i == sc->conf->iomux_nbanks) {
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device_printf(sc->dev, "Unknown pin %d in bank %d\n", pin,
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bank);
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return;
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}
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/* Parse pin function */
|
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reg = sc->conf->iomux_conf[i].offset;
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switch (sc->conf->iomux_conf[i].nbits) {
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case 3:
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if ((pin % 8) >= 5)
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reg += 4;
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bit = (pin % 8 % 5) * 3;
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mask = (0x7 << bit) << 16;
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break;
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case 2:
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default:
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bit = (pin % 8) * 2;
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mask = (0x3 << bit) << 16;
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break;
|
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}
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rk_pinctrl_get_fixup(sc, bank, pin, ®, &mask, &bit);
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SYSCON_WRITE_4(sc->grf, reg, function << bit | mask);
|
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/* Pull-Up/Down */
|
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bias = rk_pinctrl_parse_bias(pin_conf);
|
||||
if (bias >= 0) {
|
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reg = sc->conf->pd_offset;
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|
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reg += bank * 0x10 + ((pin / 8) * 0x4);
|
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bit = (pin % 8) * 2;
|
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mask = (0x3 << bit) << 16;
|
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SYSCON_WRITE_4(sc->grf, reg, bias << bit | mask);
|
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}
|
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|
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/* Drive Strength */
|
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if (rk_pinctrl_parse_drive(sc, pin_conf, &drive) == 0) {
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reg = sc->conf->drive_offset;
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reg += bank * 0x10 + ((pin / 8) * 0x4);
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bit = (pin % 8) * 2;
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mask = (0x3 << bit) << 16;
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SYSCON_WRITE_4(sc->grf, reg, bias << bit | mask);
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}
|
||||
}
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|
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static int
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rk_pinctrl_configure_pins(device_t dev, phandle_t cfgxref)
|
||||
{
|
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struct rk_pinctrl_softc *sc;
|
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phandle_t node;
|
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uint32_t *pins;
|
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int i, npins;
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sc = device_get_softc(dev);
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node = OF_node_from_xref(cfgxref);
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npins = OF_getencprop_alloc_multi(node, "rockchip,pins", sizeof(*pins),
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(void **)&pins);
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if (npins <= 0)
|
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return (ENOENT);
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for (i = 0; i != npins; i += 4)
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rk_pinctrl_configure_pin(sc, pins + i);
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|
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return (0);
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}
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static int
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rk_pinctrl_probe(device_t dev)
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{
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|
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if (!ofw_bus_status_okay(dev))
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return (ENXIO);
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|
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if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
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return (ENXIO);
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|
||||
device_set_desc(dev, "RockChip Pinctrl controller");
|
||||
return (BUS_PROBE_DEFAULT);
|
||||
}
|
||||
|
||||
static int
|
||||
rk_pinctrl_attach(device_t dev)
|
||||
{
|
||||
struct rk_pinctrl_softc *sc;
|
||||
phandle_t node;
|
||||
device_t cdev;
|
||||
|
||||
sc = device_get_softc(dev);
|
||||
sc->dev = dev;
|
||||
|
||||
node = ofw_bus_get_node(dev);
|
||||
|
||||
if (OF_hasprop(node, "rockchip,grf") &&
|
||||
syscon_get_by_ofw_property(dev, node,
|
||||
"rockchip,grf", &sc->grf) != 0) {
|
||||
device_printf(dev, "cannot get grf driver handle\n");
|
||||
return (ENXIO);
|
||||
}
|
||||
|
||||
sc->conf = (struct rk_pinctrl_conf *)ofw_bus_search_compatible(dev,
|
||||
compat_data)->ocd_data;
|
||||
|
||||
fdt_pinctrl_register(dev, "rockchip,pins");
|
||||
fdt_pinctrl_configure_tree(dev);
|
||||
|
||||
simplebus_init(dev, node);
|
||||
|
||||
bus_generic_probe(dev);
|
||||
|
||||
/* Attach child devices */
|
||||
for (node = OF_child(node); node > 0; node = OF_peer(node)) {
|
||||
cdev = simplebus_add_device(dev, node, 0, NULL, -1, NULL);
|
||||
if (cdev != NULL)
|
||||
device_probe_and_attach(cdev);
|
||||
}
|
||||
|
||||
return (bus_generic_attach(dev));
|
||||
}
|
||||
|
||||
static int
|
||||
rk_pinctrl_detach(device_t dev)
|
||||
{
|
||||
|
||||
return (EBUSY);
|
||||
}
|
||||
|
||||
static device_method_t rk_pinctrl_methods[] = {
|
||||
/* Device interface */
|
||||
DEVMETHOD(device_probe, rk_pinctrl_probe),
|
||||
DEVMETHOD(device_attach, rk_pinctrl_attach),
|
||||
DEVMETHOD(device_detach, rk_pinctrl_detach),
|
||||
|
||||
/* fdt_pinctrl interface */
|
||||
DEVMETHOD(fdt_pinctrl_configure,rk_pinctrl_configure_pins),
|
||||
|
||||
DEVMETHOD_END
|
||||
};
|
||||
|
||||
static devclass_t rk_pinctrl_devclass;
|
||||
|
||||
DEFINE_CLASS_1(rk_pinctrl, rk_pinctrl_driver, rk_pinctrl_methods,
|
||||
sizeof(struct rk_pinctrl_softc), simplebus_driver);
|
||||
|
||||
EARLY_DRIVER_MODULE(rk_pinctrl, simplebus, rk_pinctrl_driver,
|
||||
rk_pinctrl_devclass, 0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);
|
||||
MODULE_VERSION(rk_pinctrl, 1);
|
||||
|
|
@ -243,6 +243,7 @@ cddl/dev/dtrace/aarch64/dtrace_subr.c optional dtrace compile-with "${DTRACE_C
|
|||
cddl/dev/fbt/aarch64/fbt_isa.c optional dtrace_fbt | dtraceall compile-with "${FBT_C}"
|
||||
|
||||
arm64/rockchip/rk_grf.c optional fdt soc_rockchip_rk3328
|
||||
arm64/rockchip/rk_pinctrl.c optional fdt soc_rockchip_rk3328
|
||||
arm64/rockchip/clk/rk_cru.c optional fdt soc_rockchip_rk3328
|
||||
arm64/rockchip/clk/rk_clk_composite.c optional fdt soc_rockchip_rk3328
|
||||
arm64/rockchip/clk/rk_clk_gate.c optional fdt soc_rockchip_rk3328
|
||||
|
|
|
|||
Loading…
Reference in a new issue