302 lines
7.2 KiB
C
302 lines
7.2 KiB
C
/*-
|
|
* Copyright (c) 2016 Jared McNeill <jmcneill@invisible.ca>
|
|
* All rights reserved.
|
|
*
|
|
* 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
/*
|
|
* Allwinner oscillator clock
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/rman.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/module.h>
|
|
#include <machine/bus.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 "clkdev_if.h"
|
|
|
|
#define CCU_BASE 0x01c20000
|
|
#define CCU_SIZE 0x400
|
|
|
|
#define PRCM_BASE 0x01f01400
|
|
#define PRCM_SIZE 0x200
|
|
|
|
#define SYSCTRL_BASE 0x01c00000
|
|
#define SYSCTRL_SIZE 0x34
|
|
|
|
struct aw_ccu_softc {
|
|
struct simplebus_softc sc;
|
|
bus_space_tag_t bst;
|
|
bus_space_handle_t ccu_bsh;
|
|
bus_space_handle_t prcm_bsh;
|
|
bus_space_handle_t sysctrl_bsh;
|
|
struct mtx mtx;
|
|
int flags;
|
|
};
|
|
|
|
#define CLOCK_CCU (1 << 0)
|
|
#define CLOCK_PRCM (1 << 1)
|
|
#define CLOCK_SYSCTRL (1 << 2)
|
|
|
|
static struct ofw_compat_data compat_data[] = {
|
|
{ "allwinner,sun4i-a10", CLOCK_CCU },
|
|
{ "allwinner,sun5i-a13", CLOCK_CCU },
|
|
{ "allwinner,sun7i-a20", CLOCK_CCU },
|
|
{ "allwinner,sun6i-a31", CLOCK_CCU },
|
|
{ "allwinner,sun6i-a31s", CLOCK_CCU },
|
|
{ "allwinner,sun50i-a64", CLOCK_CCU },
|
|
{ "allwinner,sun8i-a83t", CLOCK_CCU|CLOCK_PRCM|CLOCK_SYSCTRL },
|
|
{ "allwinner,sun8i-h3", CLOCK_CCU|CLOCK_PRCM },
|
|
{ NULL, 0 }
|
|
};
|
|
|
|
static int
|
|
aw_ccu_check_addr(struct aw_ccu_softc *sc, bus_addr_t addr,
|
|
bus_space_handle_t *pbsh, bus_size_t *poff)
|
|
{
|
|
if (addr >= CCU_BASE && addr < (CCU_BASE + CCU_SIZE) &&
|
|
(sc->flags & CLOCK_CCU) != 0) {
|
|
*poff = addr - CCU_BASE;
|
|
*pbsh = sc->ccu_bsh;
|
|
return (0);
|
|
}
|
|
if (addr >= PRCM_BASE && addr < (PRCM_BASE + PRCM_SIZE) &&
|
|
(sc->flags & CLOCK_PRCM) != 0) {
|
|
*poff = addr - PRCM_BASE;
|
|
*pbsh = sc->prcm_bsh;
|
|
return (0);
|
|
}
|
|
if (addr >= SYSCTRL_BASE && addr < (SYSCTRL_BASE + SYSCTRL_SIZE) &&
|
|
(sc->flags & CLOCK_SYSCTRL) != 0) {
|
|
*poff = addr - SYSCTRL_BASE;
|
|
*pbsh = sc->sysctrl_bsh;
|
|
return (0);
|
|
}
|
|
return (EINVAL);
|
|
}
|
|
|
|
static int
|
|
aw_ccu_write_4(device_t dev, bus_addr_t addr, uint32_t val)
|
|
{
|
|
struct aw_ccu_softc *sc;
|
|
bus_space_handle_t bsh;
|
|
bus_size_t reg;
|
|
|
|
sc = device_get_softc(dev);
|
|
|
|
if (aw_ccu_check_addr(sc, addr, &bsh, ®) != 0)
|
|
return (EINVAL);
|
|
|
|
mtx_assert(&sc->mtx, MA_OWNED);
|
|
bus_space_write_4(sc->bst, bsh, reg, val);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
aw_ccu_read_4(device_t dev, bus_addr_t addr, uint32_t *val)
|
|
{
|
|
struct aw_ccu_softc *sc;
|
|
bus_space_handle_t bsh;
|
|
bus_size_t reg;
|
|
|
|
sc = device_get_softc(dev);
|
|
|
|
if (aw_ccu_check_addr(sc, addr, &bsh, ®) != 0)
|
|
return (EINVAL);
|
|
|
|
mtx_assert(&sc->mtx, MA_OWNED);
|
|
*val = bus_space_read_4(sc->bst, bsh, reg);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
aw_ccu_modify_4(device_t dev, bus_addr_t addr, uint32_t clr, uint32_t set)
|
|
{
|
|
struct aw_ccu_softc *sc;
|
|
bus_space_handle_t bsh;
|
|
bus_size_t reg;
|
|
uint32_t val;
|
|
|
|
sc = device_get_softc(dev);
|
|
|
|
if (aw_ccu_check_addr(sc, addr, &bsh, ®) != 0)
|
|
return (EINVAL);
|
|
|
|
mtx_assert(&sc->mtx, MA_OWNED);
|
|
val = bus_space_read_4(sc->bst, bsh, reg);
|
|
val &= ~clr;
|
|
val |= set;
|
|
bus_space_write_4(sc->bst, bsh, reg, val);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
aw_ccu_device_lock(device_t dev)
|
|
{
|
|
struct aw_ccu_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
mtx_lock(&sc->mtx);
|
|
}
|
|
|
|
static void
|
|
aw_ccu_device_unlock(device_t dev)
|
|
{
|
|
struct aw_ccu_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
mtx_unlock(&sc->mtx);
|
|
}
|
|
|
|
static const struct ofw_compat_data *
|
|
aw_ccu_search_compatible(void)
|
|
{
|
|
const struct ofw_compat_data *compat;
|
|
phandle_t root;
|
|
|
|
root = OF_finddevice("/");
|
|
for (compat = compat_data; compat->ocd_str != NULL; compat++)
|
|
if (ofw_bus_node_is_compatible(root, compat->ocd_str))
|
|
break;
|
|
|
|
return (compat);
|
|
}
|
|
|
|
static int
|
|
aw_ccu_probe(device_t dev)
|
|
{
|
|
const char *name;
|
|
|
|
name = ofw_bus_get_name(dev);
|
|
|
|
if (name == NULL || strcmp(name, "clocks") != 0)
|
|
return (ENXIO);
|
|
|
|
if (aw_ccu_search_compatible()->ocd_data == 0)
|
|
return (ENXIO);
|
|
|
|
device_set_desc(dev, "Allwinner Clock Control Unit");
|
|
return (BUS_PROBE_SPECIFIC);
|
|
}
|
|
|
|
static int
|
|
aw_ccu_attach(device_t dev)
|
|
{
|
|
struct aw_ccu_softc *sc;
|
|
phandle_t node, child;
|
|
device_t cdev;
|
|
int error;
|
|
|
|
sc = device_get_softc(dev);
|
|
node = ofw_bus_get_node(dev);
|
|
|
|
simplebus_init(dev, node);
|
|
|
|
sc->flags = aw_ccu_search_compatible()->ocd_data;
|
|
|
|
/*
|
|
* Map registers. The DT doesn't have a "reg" property
|
|
* for the /clocks node and child nodes have conflicting "reg"
|
|
* properties.
|
|
*/
|
|
sc->bst = bus_get_bus_tag(dev);
|
|
if (sc->flags & CLOCK_CCU) {
|
|
error = bus_space_map(sc->bst, CCU_BASE, CCU_SIZE, 0,
|
|
&sc->ccu_bsh);
|
|
if (error != 0) {
|
|
device_printf(dev, "couldn't map CCU: %d\n", error);
|
|
return (error);
|
|
}
|
|
}
|
|
if (sc->flags & CLOCK_PRCM) {
|
|
error = bus_space_map(sc->bst, PRCM_BASE, PRCM_SIZE, 0,
|
|
&sc->prcm_bsh);
|
|
if (error != 0) {
|
|
device_printf(dev, "couldn't map PRCM: %d\n", error);
|
|
return (error);
|
|
}
|
|
}
|
|
if (sc->flags & CLOCK_SYSCTRL) {
|
|
error = bus_space_map(sc->bst, SYSCTRL_BASE, SYSCTRL_SIZE, 0,
|
|
&sc->sysctrl_bsh);
|
|
if (error != 0) {
|
|
device_printf(dev, "couldn't map SYSCTRL: %d\n", error);
|
|
return (error);
|
|
}
|
|
}
|
|
|
|
mtx_init(&sc->mtx, device_get_nameunit(dev), NULL, MTX_DEF);
|
|
|
|
/* Attach child devices */
|
|
for (child = OF_child(node); child > 0; child = OF_peer(child)) {
|
|
cdev = simplebus_add_device(dev, child, 0, NULL, -1, NULL);
|
|
if (cdev != NULL)
|
|
device_probe_and_attach(cdev);
|
|
}
|
|
|
|
return (bus_generic_attach(dev));
|
|
}
|
|
|
|
static device_method_t aw_ccu_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_probe, aw_ccu_probe),
|
|
DEVMETHOD(device_attach, aw_ccu_attach),
|
|
|
|
/* clkdev interface */
|
|
DEVMETHOD(clkdev_write_4, aw_ccu_write_4),
|
|
DEVMETHOD(clkdev_read_4, aw_ccu_read_4),
|
|
DEVMETHOD(clkdev_modify_4, aw_ccu_modify_4),
|
|
DEVMETHOD(clkdev_device_lock, aw_ccu_device_lock),
|
|
DEVMETHOD(clkdev_device_unlock, aw_ccu_device_unlock),
|
|
|
|
DEVMETHOD_END
|
|
};
|
|
|
|
DEFINE_CLASS_1(aw_ccu, aw_ccu_driver, aw_ccu_methods,
|
|
sizeof(struct aw_ccu_softc), simplebus_driver);
|
|
|
|
static devclass_t aw_ccu_devclass;
|
|
|
|
EARLY_DRIVER_MODULE(aw_ccu, simplebus, aw_ccu_driver, aw_ccu_devclass,
|
|
0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
|
|
|
|
MODULE_VERSION(aw_ccu, 1);
|