diff options
Diffstat (limited to 'sys/arm/amlogic/aml8726/aml8726_ccm.c')
| -rw-r--r-- | sys/arm/amlogic/aml8726/aml8726_ccm.c | 228 |
1 files changed, 0 insertions, 228 deletions
diff --git a/sys/arm/amlogic/aml8726/aml8726_ccm.c b/sys/arm/amlogic/aml8726/aml8726_ccm.c deleted file mode 100644 index 9013b0545ad8..000000000000 --- a/sys/arm/amlogic/aml8726/aml8726_ccm.c +++ /dev/null @@ -1,228 +0,0 @@ -/*- - * Copyright 2015 John Wehle <john@feith.com> - * 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 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. - */ - -/* - * Amlogic aml8726 clock control module driver. - * - */ - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/conf.h> -#include <sys/bus.h> -#include <sys/kernel.h> -#include <sys/module.h> -#include <sys/lock.h> -#include <sys/mutex.h> -#include <sys/resource.h> -#include <sys/rman.h> - -#include <machine/bus.h> - -#include <dev/ofw/ofw_bus.h> -#include <dev/ofw/ofw_bus_subr.h> - -#include <arm/amlogic/aml8726/aml8726_soc.h> -#include <arm/amlogic/aml8726/aml8726_ccm.h> - -struct aml8726_ccm_softc { - device_t dev; - struct aml8726_ccm_function *soc; - struct resource *res[1]; - struct mtx mtx; -}; - -static struct resource_spec aml8726_ccm_spec[] = { - { SYS_RES_MEMORY, 0, RF_ACTIVE }, - { -1, 0 } -}; - -#define AML_CCM_LOCK(sc) mtx_lock(&(sc)->mtx) -#define AML_CCM_UNLOCK(sc) mtx_unlock(&(sc)->mtx) -#define AML_CCM_LOCK_INIT(sc) \ - mtx_init(&(sc)->mtx, device_get_nameunit((sc)->dev), \ - "ccm", MTX_DEF) -#define AML_CCM_LOCK_DESTROY(sc) mtx_destroy(&(sc)->mtx); - -#define CSR_WRITE_4(sc, reg, val) bus_write_4((sc)->res[0], reg, (val)) -#define CSR_READ_4(sc, reg) bus_read_4((sc)->res[0], reg) - -static int -aml8726_ccm_configure_gates(struct aml8726_ccm_softc *sc) -{ - struct aml8726_ccm_function *f; - struct aml8726_ccm_gate *g; - char *function_name; - char *functions; - phandle_t node; - ssize_t len; - uint32_t value; - - node = ofw_bus_get_node(sc->dev); - - len = OF_getprop_alloc(node, "functions", - (void **)&functions); - - if (len < 0) { - device_printf(sc->dev, "missing functions attribute in FDT\n"); - return (ENXIO); - } - - function_name = functions; - - while (len) { - for (f = sc->soc; f->name != NULL; f++) - if (strncmp(f->name, function_name, len) == 0) - break; - - if (f->name == NULL) { - /* display message prior to queuing up next string */ - device_printf(sc->dev, - "unknown function attribute %.*s in FDT\n", - len, function_name); - } - - /* queue up next string */ - while (*function_name && len) { - function_name++; - len--; - } - if (len) { - function_name++; - len--; - } - - if (f->name == NULL) - continue; - - AML_CCM_LOCK(sc); - - /* - * Enable the clock gates necessary for the function. - * - * In some cases a clock may be shared across functions - * (meaning don't disable a clock without ensuring that - * it's not required by someone else). - */ - for (g = f->gates; g->bits != 0x00000000; g++) { - value = CSR_READ_4(sc, g->addr); - value |= g->bits; - CSR_WRITE_4(sc, g->addr, value); - } - - AML_CCM_UNLOCK(sc); - } - - OF_prop_free(functions); - - return (0); -} - -static int -aml8726_ccm_probe(device_t dev) -{ - - if (!ofw_bus_status_okay(dev)) - return (ENXIO); - - if (!ofw_bus_is_compatible(dev, "amlogic,aml8726-ccm")) - return (ENXIO); - - device_set_desc(dev, "Amlogic aml8726 ccm"); - - return (BUS_PROBE_DEFAULT); -} - -static int -aml8726_ccm_attach(device_t dev) -{ - struct aml8726_ccm_softc *sc = device_get_softc(dev); - - sc->dev = dev; - - switch (aml8726_soc_hw_rev) { - case AML_SOC_HW_REV_M3: - sc->soc = aml8726_m3_ccm; - break; - case AML_SOC_HW_REV_M6: - sc->soc = aml8726_m6_ccm; - break; - case AML_SOC_HW_REV_M8: - sc->soc = aml8726_m8_ccm; - break; - case AML_SOC_HW_REV_M8B: - sc->soc = aml8726_m8b_ccm; - break; - default: - device_printf(dev, "unsupported SoC\n"); - return (ENXIO); - /* NOTREACHED */ - } - - if (bus_alloc_resources(dev, aml8726_ccm_spec, sc->res)) { - device_printf(dev, "can not allocate resources for device\n"); - return (ENXIO); - } - - AML_CCM_LOCK_INIT(sc); - - return (aml8726_ccm_configure_gates(sc)); -} - -static int -aml8726_ccm_detach(device_t dev) -{ - struct aml8726_ccm_softc *sc = device_get_softc(dev); - - AML_CCM_LOCK_DESTROY(sc); - - bus_release_resources(dev, aml8726_ccm_spec, sc->res); - - return (0); -} - -static device_method_t aml8726_ccm_methods[] = { - /* Device interface */ - DEVMETHOD(device_probe, aml8726_ccm_probe), - DEVMETHOD(device_attach, aml8726_ccm_attach), - DEVMETHOD(device_detach, aml8726_ccm_detach), - - DEVMETHOD_END -}; - -static driver_t aml8726_ccm_driver = { - "ccm", - aml8726_ccm_methods, - sizeof(struct aml8726_ccm_softc), -}; - -static devclass_t aml8726_ccm_devclass; - -EARLY_DRIVER_MODULE(ccm, simplebus, aml8726_ccm_driver, - aml8726_ccm_devclass, 0, 0, BUS_PASS_CPU + BUS_PASS_ORDER_LATE); |