Add ARMADA38X clkgen driver
This patch introduces clkgen driver for Armada38x SoCs. Clock topology consists of single coreclk which supplies clock signal to CPU cores and peripherials. Reviewed by: manu Obtained from: Semihalf Differential Revision: https://reviews.freebsd.org/D36453
This commit is contained in:
Albert Jakieła
Kornel Dulęba
parent
299b6c9cb1
commit
07c5be33f1
222
sys/arm/mv/clk/armada38x_coreclk.c
Normal file
222
sys/arm/mv/clk/armada38x_coreclk.c
Normal file
@ -0,0 +1,222 @@
|
||||
/*-
|
||||
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
||||
*
|
||||
* Copyright (c) 2022 Semihalf.
|
||||
*
|
||||
* 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 ``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 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/cdefs.h>
|
||||
__FBSDID("$FressBSD$");
|
||||
|
||||
#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 <machine/fdt.h>
|
||||
|
||||
#include <dev/fdt/simplebus.h>
|
||||
#include <dev/ofw/ofw_bus.h>
|
||||
#include <dev/ofw/ofw_bus_subr.h>
|
||||
#include <dev/extres/clk/clk.h>
|
||||
|
||||
#include <arm/mv/mvwin.h>
|
||||
#include <arm/mv/mvreg.h>
|
||||
#include <arm/mv/mvvar.h>
|
||||
|
||||
#include <arm/mv/clk/armada38x_gen.h>
|
||||
|
||||
#include "clkdev_if.h"
|
||||
|
||||
#define ARMADA38X_CORECLK_MAXREG 0
|
||||
|
||||
static struct resource_spec armada38x_coreclk_specs[] = {
|
||||
{ SYS_RES_MEMORY, 0, RF_ACTIVE },
|
||||
{ -1, 0 }
|
||||
};
|
||||
|
||||
struct armada38x_coreclk_softc {
|
||||
struct resource *res;
|
||||
struct clkdom *clkdom;
|
||||
struct mtx mtx;
|
||||
};
|
||||
|
||||
static int armada38x_coreclk_attach(device_t dev);
|
||||
static int armada38x_coreclk_probe(device_t dev);
|
||||
|
||||
static struct armada38x_gen_clknode_def gen_nodes[] =
|
||||
{
|
||||
{
|
||||
.def = {
|
||||
.name = "coreclk_0",
|
||||
.id = 0,
|
||||
.parent_cnt = 0,
|
||||
},
|
||||
},
|
||||
{
|
||||
.def = {
|
||||
.name = "coreclk_2",
|
||||
.id = 1,
|
||||
.parent_cnt = 0,
|
||||
},
|
||||
}
|
||||
};
|
||||
|
||||
static int
|
||||
armada38x_coreclk_read_4(device_t dev, bus_addr_t addr, uint32_t *val)
|
||||
{
|
||||
struct armada38x_coreclk_softc *sc;
|
||||
|
||||
sc = device_get_softc(dev);
|
||||
|
||||
if (addr > ARMADA38X_CORECLK_MAXREG)
|
||||
return (EINVAL);
|
||||
|
||||
*val = bus_read_4(sc->res, addr);
|
||||
|
||||
return (0);
|
||||
}
|
||||
|
||||
static int
|
||||
armada38x_coreclk_write_4(device_t dev, bus_addr_t addr, uint32_t val)
|
||||
{
|
||||
struct armada38x_coreclk_softc *sc;
|
||||
|
||||
sc = device_get_softc(dev);
|
||||
|
||||
if (addr > ARMADA38X_CORECLK_MAXREG)
|
||||
return (EINVAL);
|
||||
|
||||
bus_write_4(sc->res, addr, val);
|
||||
|
||||
return (0);
|
||||
}
|
||||
|
||||
static void
|
||||
armada38x_coreclk_device_lock(device_t dev)
|
||||
{
|
||||
struct armada38x_coreclk_softc *sc;
|
||||
|
||||
sc = device_get_softc(dev);
|
||||
mtx_lock(&sc->mtx);
|
||||
}
|
||||
|
||||
static void
|
||||
armada38x_coreclk_device_unlock(device_t dev)
|
||||
{
|
||||
struct armada38x_coreclk_softc *sc;
|
||||
|
||||
sc = device_get_softc(dev);
|
||||
mtx_unlock(&sc->mtx);
|
||||
}
|
||||
|
||||
static int
|
||||
armada38x_coreclk_probe(device_t dev)
|
||||
{
|
||||
|
||||
if (!ofw_bus_status_okay(dev))
|
||||
return (ENXIO);
|
||||
|
||||
if (!ofw_bus_is_compatible(dev, "marvell,armada-380-core-clock"))
|
||||
return (ENXIO);
|
||||
|
||||
device_set_desc(dev, "ARMADA38X core-clock");
|
||||
|
||||
return (BUS_PROBE_DEFAULT);
|
||||
}
|
||||
|
||||
static int
|
||||
armada38x_coreclk_create_coreclk(device_t dev)
|
||||
{
|
||||
struct armada38x_coreclk_softc *sc;
|
||||
int rv, i;
|
||||
|
||||
sc = device_get_softc(dev);
|
||||
|
||||
for (i = 0; i < nitems(gen_nodes); ++i) {
|
||||
rv = armada38x_gen_register(sc->clkdom, &gen_nodes[i]);
|
||||
if (rv)
|
||||
return (rv);
|
||||
}
|
||||
|
||||
return (rv);
|
||||
}
|
||||
|
||||
static int
|
||||
armada38x_coreclk_attach(device_t dev)
|
||||
{
|
||||
struct armada38x_coreclk_softc *sc;
|
||||
int error;
|
||||
|
||||
sc = device_get_softc(dev);
|
||||
|
||||
if (bus_alloc_resources(dev, armada38x_coreclk_specs, &sc->res) != 0) {
|
||||
device_printf(dev, "Cannot allocate resources.\n");
|
||||
return (ENXIO);
|
||||
}
|
||||
|
||||
mtx_init(&sc->mtx, device_get_nameunit(dev), NULL, MTX_DEF);
|
||||
|
||||
sc->clkdom = clkdom_create(dev);
|
||||
if (NULL == sc->clkdom) {
|
||||
device_printf(dev, "Cannot create clkdom\n");
|
||||
return (ENXIO);
|
||||
}
|
||||
|
||||
error = armada38x_coreclk_create_coreclk(dev);
|
||||
if (0 != error) {
|
||||
device_printf(dev, "Cannot create coreclk.\n");
|
||||
return (error);
|
||||
}
|
||||
|
||||
if (clkdom_finit(sc->clkdom) != 0)
|
||||
panic("Cannot finalize clock domain initialization.\n");
|
||||
|
||||
if (bootverbose)
|
||||
clkdom_dump(sc->clkdom);
|
||||
|
||||
return (0);
|
||||
}
|
||||
|
||||
static device_method_t amada38x_coreclk_methods[] = {
|
||||
DEVMETHOD(clkdev_write_4, armada38x_coreclk_write_4),
|
||||
DEVMETHOD(clkdev_read_4, armada38x_coreclk_read_4),
|
||||
DEVMETHOD(clkdev_device_lock, armada38x_coreclk_device_lock),
|
||||
DEVMETHOD(clkdev_device_unlock, armada38x_coreclk_device_unlock),
|
||||
|
||||
DEVMETHOD(device_attach, armada38x_coreclk_attach),
|
||||
DEVMETHOD(device_probe, armada38x_coreclk_probe),
|
||||
|
||||
DEVMETHOD_END
|
||||
};
|
||||
|
||||
static driver_t armada38x_coreclk_driver = {
|
||||
"armada38x_coreclk",
|
||||
amada38x_coreclk_methods,
|
||||
sizeof(struct armada38x_coreclk_softc),
|
||||
};
|
||||
|
||||
EARLY_DRIVER_MODULE(armada38x_coreclk, simplebus, armada38x_coreclk_driver, 0, 0,
|
||||
BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
|
||||
100
sys/arm/mv/clk/armada38x_gen.c
Normal file
100
sys/arm/mv/clk/armada38x_gen.c
Normal file
@ -0,0 +1,100 @@
|
||||
/*-
|
||||
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
||||
*
|
||||
* Copyright (c) 2022 Semihalf.
|
||||
*
|
||||
* 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 ``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 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/cdefs.h>
|
||||
__FBSDID("$FreeBSD$");
|
||||
|
||||
#include <sys/param.h>
|
||||
#include <sys/systm.h>
|
||||
#include <sys/bus.h>
|
||||
|
||||
#include <machine/bus.h>
|
||||
|
||||
#include <dev/extres/clk/clk.h>
|
||||
|
||||
#include <arm/mv/clk/armada38x_gen.h>
|
||||
|
||||
#include "clkdev_if.h"
|
||||
|
||||
#define SAR_A38X_TCLK_FREQ_SHIFT 15
|
||||
#define SAR_A38X_TCLK_FREQ_MASK 0x00008000
|
||||
|
||||
#define TCLK_250MHZ 250 * 1000 * 1000
|
||||
#define TCLK_200MHZ 200 * 1000 * 1000
|
||||
|
||||
#define WR4(_clk, offset, val) \
|
||||
CLKDEV_WRITE_4(clknode_get_device(_clk), offset, val)
|
||||
#define RD4(_clk, offset, val) \
|
||||
CLKDEV_READ_4(clknode_get_device(_clk), offset, val)
|
||||
#define DEVICE_LOCK(_clk) \
|
||||
CLKDEV_DEVICE_LOCK(clknode_get_device(_clk))
|
||||
#define DEVICE_UNLOCK(_clk) \
|
||||
CLKDEV_DEVICE_UNLOCK(clknode_get_device(_clk))
|
||||
|
||||
static int
|
||||
armada38x_gen_recalc(struct clknode *clk, uint64_t *freq)
|
||||
{
|
||||
uint32_t reg;
|
||||
|
||||
DEVICE_LOCK(clk);
|
||||
RD4(clk, 0, ®);
|
||||
DEVICE_UNLOCK(clk);
|
||||
|
||||
reg = (reg & SAR_A38X_TCLK_FREQ_MASK) >> SAR_A38X_TCLK_FREQ_SHIFT;
|
||||
*freq = reg ? TCLK_200MHZ : TCLK_250MHZ;
|
||||
|
||||
return (0);
|
||||
}
|
||||
|
||||
static int
|
||||
armada38x_gen_init(struct clknode *clk, device_t dev)
|
||||
{
|
||||
return (0);
|
||||
}
|
||||
|
||||
static clknode_method_t armada38x_gen_clknode_methods[] = {
|
||||
/* Device interface */
|
||||
CLKNODEMETHOD(clknode_init, armada38x_gen_init),
|
||||
CLKNODEMETHOD(clknode_recalc_freq, armada38x_gen_recalc),
|
||||
CLKNODEMETHOD_END
|
||||
};
|
||||
|
||||
DEFINE_CLASS_1(armada38x_gen_clknode, armada38x_gen_clknode_class,
|
||||
armada38x_gen_clknode_methods, 0, clknode_class);
|
||||
|
||||
int
|
||||
armada38x_gen_register(struct clkdom *clkdom, const struct armada38x_gen_clknode_def *clkdef)
|
||||
{
|
||||
struct clknode *clk;
|
||||
|
||||
clk = clknode_create(clkdom, &armada38x_gen_clknode_class, &clkdef->def);
|
||||
if (clk == NULL)
|
||||
return (1);
|
||||
|
||||
clknode_register(clkdom, clk);
|
||||
|
||||
return(0);
|
||||
}
|
||||
40
sys/arm/mv/clk/armada38x_gen.h
Normal file
40
sys/arm/mv/clk/armada38x_gen.h
Normal file
@ -0,0 +1,40 @@
|
||||
/*-
|
||||
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
||||
*
|
||||
* Copyright (c) 2022 Semihalf.
|
||||
*
|
||||
* 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 ``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 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.
|
||||
*/
|
||||
|
||||
#ifndef _ARMADA38X_GEN_H_
|
||||
#define _ARMADA38X_GEN_H_
|
||||
|
||||
#include <dev/extres/clk/clk.h>
|
||||
|
||||
struct armada38x_gen_clknode_def
|
||||
{
|
||||
struct clknode_init_def def;
|
||||
};
|
||||
|
||||
int armada38x_gen_register(struct clkdom *clkdom,
|
||||
const struct armada38x_gen_clknode_def *clkdef);
|
||||
|
||||
#endif
|
||||
@ -34,3 +34,6 @@ dev/usb/controller/ehci_mv.c optional ehci
|
||||
dev/usb/controller/generic_xhci.c optional xhci
|
||||
dev/usb/controller/generic_xhci_fdt.c optional xhci
|
||||
dev/ahci/ahci_mv_fdt.c optional ahci
|
||||
|
||||
arm/mv/clk/armada38x_coreclk.c standard
|
||||
arm/mv/clk/armada38x_gen.c standard
|
||||
|
||||
Loading…
Reference in New Issue
Block a user