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Date:      Thu, 25 Jan 2018 16:58:23 +0000 (UTC)
From:      Ruslan Bukin <br@FreeBSD.org>
To:        src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org
Subject:   svn commit: r328402 - head/sys/dev/usb/controller
Message-ID:  <201801251658.w0PGwNcq058492@repo.freebsd.org>

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Author: br
Date: Thu Jan 25 16:58:23 2018
New Revision: 328402
URL: https://svnweb.freebsd.org/changeset/base/328402

Log:
  Add basic driver for Qualcomm USB 2.0 EHCI controller.
  This driver relies on system initialization in u-boot.
  
  Tested on DragonBoard 410c.
  
  Sponsored by:	DARPA, AFRL

Added:
  head/sys/dev/usb/controller/ehci_msm.c   (contents, props changed)

Added: head/sys/dev/usb/controller/ehci_msm.c
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ head/sys/dev/usb/controller/ehci_msm.c	Thu Jan 25 16:58:23 2018	(r328402)
@@ -0,0 +1,231 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * 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 "opt_bus.h"
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/rman.h>
+#include <sys/condvar.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include <dev/usb/usb.h>
+#include <dev/usb/usbdi.h>
+
+#include <dev/usb/usb_core.h>
+#include <dev/usb/usb_busdma.h>
+#include <dev/usb/usb_process.h>
+#include <dev/usb/usb_util.h>
+
+#include <dev/usb/usb_controller.h>
+#include <dev/usb/usb_bus.h>
+#include <dev/usb/controller/ehci.h>
+#include <dev/usb/controller/ehcireg.h>
+
+struct ehci_msm_softc {
+	ehci_softc_t		base;
+	struct resource		*res[3];
+};
+
+static struct resource_spec ehci_msm_spec[] = {
+	{ SYS_RES_MEMORY,	0,	RF_ACTIVE },
+	{ SYS_RES_MEMORY,	1,	RF_ACTIVE },
+	{ SYS_RES_IRQ,		0,	RF_ACTIVE },
+	{ -1, 0 }
+};
+
+#define	EHCI_HC_DEVSTR		"Qualcomm USB 2.0 controller"
+
+static device_attach_t ehci_msm_attach;
+static device_detach_t ehci_msm_detach;
+
+static int
+ehci_msm_probe(device_t dev)
+{
+
+	if (!ofw_bus_is_compatible(dev, "qcom,ci-hdrc"))
+		return (ENXIO);
+
+	device_set_desc(dev, EHCI_HC_DEVSTR);
+
+	return (BUS_PROBE_DEFAULT);
+}
+
+static int
+ehci_msm_attach(device_t dev)
+{
+	struct ehci_msm_softc *esc;
+	bus_space_handle_t bsh;
+	ehci_softc_t *sc;
+	int err;
+
+	esc = device_get_softc(dev);
+	sc = &esc->base;
+	sc->sc_bus.parent = dev;
+	sc->sc_bus.devices = sc->sc_devices;
+	sc->sc_bus.devices_max = EHCI_MAX_DEVICES;
+	sc->sc_bus.dma_bits = 32;
+
+	if (bus_alloc_resources(dev, ehci_msm_spec, esc->res)) {
+		device_printf(dev, "could not allocate resources\n");
+		return (ENXIO);
+	}
+
+	sc->sc_io_tag = rman_get_bustag(esc->res[0]);
+
+	/* Get all DMA memory */
+	if (usb_bus_mem_alloc_all(&sc->sc_bus,
+	    USB_GET_DMA_TAG(dev), &ehci_iterate_hw_softc)) {
+		return (ENOMEM);
+	}
+
+	/* EHCI registers */
+	sc->sc_io_tag = rman_get_bustag(esc->res[0]);
+	bsh = rman_get_bushandle(esc->res[0]);
+	sc->sc_io_size = rman_get_size(esc->res[0]);
+
+	if (bus_space_subregion(sc->sc_io_tag, bsh, 0x100,
+	    sc->sc_io_size, &sc->sc_io_hdl) != 0)
+		panic("%s: unable to subregion USB host registers",
+		    device_get_name(dev));
+
+	sc->sc_bus.bdev = device_add_child(dev, "usbus", -1);
+	if (!sc->sc_bus.bdev) {
+		device_printf(dev, "Could not add USB device\n");
+		goto error;
+	}
+	device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
+	device_set_desc(sc->sc_bus.bdev, EHCI_HC_DEVSTR);
+
+	sprintf(sc->sc_vendor, "Qualcomm");
+
+	err = bus_setup_intr(dev, esc->res[2], INTR_TYPE_BIO | INTR_MPSAFE,
+	    NULL, (driver_intr_t *)ehci_interrupt, sc, &sc->sc_intr_hdl);
+	if (err) {
+		device_printf(dev, "Could not setup irq, %d\n", err);
+		sc->sc_intr_hdl = NULL;
+		goto error;
+	}
+
+	sc->sc_flags |= EHCI_SCFLG_DONTRESET | EHCI_SCFLG_NORESTERM;
+
+	err = ehci_init(sc);
+	if (!err) {
+		sc->sc_flags |= EHCI_SCFLG_DONEINIT;
+		err = device_probe_and_attach(sc->sc_bus.bdev);
+	}
+
+	if (err) {
+		device_printf(dev, "USB init failed err=%d\n", err);
+		goto error;
+	}
+	return (0);
+
+error:
+	ehci_msm_detach(dev);
+	return (ENXIO);
+}
+
+static int
+ehci_msm_detach(device_t dev)
+{
+	ehci_softc_t *sc;
+	device_t bdev;
+	int err;
+
+	sc = device_get_softc(dev);
+
+	if (sc->sc_bus.bdev) {
+		bdev = sc->sc_bus.bdev;
+		device_detach(bdev);
+		device_delete_child(dev, bdev);
+	}
+
+	device_delete_children(dev);
+
+	if (sc->sc_irq_res && sc->sc_intr_hdl) {
+		/* only call ehci_detach() after ehci_init() */
+		ehci_detach(sc);
+
+		err = bus_teardown_intr(dev, sc->sc_irq_res, sc->sc_intr_hdl);
+		if (err)
+			device_printf(dev, "Could not tear down irq, %d\n",
+			    err);
+		sc->sc_intr_hdl = NULL;
+	}
+
+	if (sc->sc_irq_res) {
+		bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_irq_res);
+		sc->sc_irq_res = NULL;
+	}
+	if (sc->sc_io_res) {
+		bus_release_resource(dev, SYS_RES_MEMORY, 0,
+		    sc->sc_io_res);
+		sc->sc_io_res = NULL;
+	}
+
+	usb_bus_mem_free_all(&sc->sc_bus, &ehci_iterate_hw_softc);
+
+	return (0);
+}
+
+
+static device_method_t ehci_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,		ehci_msm_probe),
+	DEVMETHOD(device_attach,	ehci_msm_attach),
+	DEVMETHOD(device_detach,	ehci_msm_detach),
+	DEVMETHOD(device_suspend,	bus_generic_suspend),
+	DEVMETHOD(device_resume,	bus_generic_resume),
+	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
+	DEVMETHOD_END
+};
+
+static driver_t ehci_driver = {
+	.name = "ehci",
+	.methods = ehci_methods,
+	.size = sizeof(ehci_softc_t),
+};
+
+static devclass_t ehci_devclass;
+
+DRIVER_MODULE(ehci_msm, simplebus, ehci_driver, ehci_devclass, 0, 0);
+MODULE_DEPEND(ehci_msm, usb, 1, 1, 1);



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