diff options
Diffstat (limited to 'sys/arm/allwinner/aw_ccu.c')
-rw-r--r-- | sys/arm/allwinner/aw_ccu.c | 252 |
1 files changed, 0 insertions, 252 deletions
diff --git a/sys/arm/allwinner/aw_ccu.c b/sys/arm/allwinner/aw_ccu.c deleted file mode 100644 index ce31ad4f4c46..000000000000 --- a/sys/arm/allwinner/aw_ccu.c +++ /dev/null @@ -1,252 +0,0 @@ -/*- - * Copyright (c) 2016 Jared McNeill <jmcneill@invisible.ca> - * - * 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/lock.h> -#include <sys/module.h> -#include <sys/mutex.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 - -struct aw_ccu_softc { - struct simplebus_softc sc; - bus_space_tag_t bst; - bus_space_handle_t bsh; - struct mtx mtx; - int flags; -}; - -static struct ofw_compat_data compat_data[] = { - { "allwinner,sun7i-a20", 1 }, - { "allwinner,sun6i-a31", 1 }, - { "allwinner,sun6i-a31s", 1 }, - { 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)) { - *poff = addr - CCU_BASE; - *pbsh = sc->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); - error = bus_space_map(sc->bst, CCU_BASE, CCU_SIZE, 0, - &sc->bsh); - if (error != 0) { - device_printf(dev, "couldn't map CCU: %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); - -EARLY_DRIVER_MODULE(aw_ccu, simplebus, aw_ccu_driver, 0, 0, - BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE); - -MODULE_VERSION(aw_ccu, 1); |