003 File Manager
Current Path:
/usr/src/sys/arm64/qualcomm
usr
/
src
/
sys
/
arm64
/
qualcomm
/
📁
..
📄
qcom_gcc.c
(4.22 KB)
Editing: qcom_gcc.c
/*- * Copyright (c) 2018 Ruslan Bukin <br@bsdpad.com> * All rights reserved. * * This software was developed by BAE Systems, the University of Cambridge * Computer Laboratory, and Memorial University under DARPA/AFRL contract * FA8650-15-C-7558 ("CADETS"), as part of the DARPA Transparent Computing * (TC) research program. * * 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. */ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); #include <sys/param.h> #include <sys/systm.h> #include <sys/bus.h> #include <sys/kthread.h> #include <sys/rman.h> #include <sys/kernel.h> #include <sys/module.h> #include <machine/bus.h> #include <dev/ofw/ofw_bus.h> #include <dev/ofw/ofw_bus_subr.h> #define GCC_QDSS_BCR 0x29000 #define GCC_QDSS_BCR_BLK_ARES (1 << 0) /* Async software reset. */ #define GCC_QDSS_CFG_AHB_CBCR 0x29008 #define AHB_CBCR_CLK_ENABLE (1 << 0) /* AHB clk branch ctrl */ #define GCC_QDSS_ETR_USB_CBCR 0x29028 #define ETR_USB_CBCR_CLK_ENABLE (1 << 0) /* ETR USB clk branch ctrl */ #define GCC_QDSS_DAP_CBCR 0x29084 #define DAP_CBCR_CLK_ENABLE (1 << 0) /* DAP clk branch ctrl */ static struct ofw_compat_data compat_data[] = { { "qcom,gcc-msm8916", 1 }, { NULL, 0 } }; struct qcom_gcc_softc { struct resource *res; }; static struct resource_spec qcom_gcc_spec[] = { { SYS_RES_MEMORY, 0, RF_ACTIVE }, { -1, 0 } }; /* * Qualcomm Debug Subsystem (QDSS) * block enabling routine. */ static void qcom_qdss_enable(struct qcom_gcc_softc *sc) { /* Put QDSS block to reset */ bus_write_4(sc->res, GCC_QDSS_BCR, GCC_QDSS_BCR_BLK_ARES); /* Enable AHB clock branch */ bus_write_4(sc->res, GCC_QDSS_CFG_AHB_CBCR, AHB_CBCR_CLK_ENABLE); /* Enable DAP clock branch */ bus_write_4(sc->res, GCC_QDSS_DAP_CBCR, DAP_CBCR_CLK_ENABLE); /* Enable ETR USB clock branch */ bus_write_4(sc->res, GCC_QDSS_ETR_USB_CBCR, ETR_USB_CBCR_CLK_ENABLE); /* Out of reset */ bus_write_4(sc->res, GCC_QDSS_BCR, 0); } static int qcom_gcc_probe(device_t dev) { if (!ofw_bus_status_okay(dev)) return (ENXIO); if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) return (ENXIO); device_set_desc(dev, "Qualcomm Global Clock Controller"); return (BUS_PROBE_DEFAULT); } static int qcom_gcc_attach(device_t dev) { struct qcom_gcc_softc *sc; sc = device_get_softc(dev); if (bus_alloc_resources(dev, qcom_gcc_spec, &sc->res) != 0) { device_printf(dev, "cannot allocate resources for device\n"); return (ENXIO); } /* * Enable debug unit. * This is required for Coresight operation. * This also enables USB clock branch. */ qcom_qdss_enable(sc); return (0); } static device_method_t qcom_gcc_methods[] = { /* Device interface */ DEVMETHOD(device_probe, qcom_gcc_probe), DEVMETHOD(device_attach, qcom_gcc_attach), DEVMETHOD_END }; static driver_t qcom_gcc_driver = { "qcom_gcc", qcom_gcc_methods, sizeof(struct qcom_gcc_softc), }; static devclass_t qcom_gcc_devclass; EARLY_DRIVER_MODULE(qcom_gcc, simplebus, qcom_gcc_driver, qcom_gcc_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE); MODULE_VERSION(qcom_gcc, 1);
Upload File
Create Folder