Author: ian
Date: Fri Dec 13 22:26:10 2013
New Revision: 259351
URL: http://svnweb.freebsd.org/changeset/base/259351
Log:
MFC r257452: Add support for the USB PHY on imx6 SoCs.
Added:
stable/10/sys/arm/freescale/imx/imx6_usbphy.c
- copied unchanged from r257452, head/sys/arm/freescale/imx/imx6_usbphy.c
Modified:
Directory Properties:
stable/10/ (props changed)
Copied: stable/10/sys/arm/freescale/imx/imx6_usbphy.c (from r257452,
head/sys/arm/freescale/imx/imx6_usbphy.c)
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ stable/10/sys/arm/freescale/imx/imx6_usbphy.c Fri Dec 13 22:26:10
2013 (r259351, copy of r257452, head/sys/arm/freescale/imx/imx6_usbphy.c)
@@ -0,0 +1,189 @@
+/*-
+ * Copyright (c) 2013 Ian Lepore <i...@freebsd.org>
+ * 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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * USBPHY driver for Freescale i.MX6 family of SoCs.
+ */
+
+#include "opt_bus.h"
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/bus.h>
+#include <sys/rman.h>
+
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include <machine/bus.h>
+
+#include <arm/freescale/imx/imx_machdep.h>
+#include <arm/freescale/imx/imx6_anatopreg.h>
+#include <arm/freescale/imx/imx6_anatopvar.h>
+
+/*
+ * Hardware register defines.
+ */
+#define PWD_REG 0x0000
+#define CTRL_STATUS_REG 0x0030
+#define CTRL_SET_REG 0x0034
+#define CTRL_CLR_REG 0x0038
+#define CTRL_TOGGLE_REG 0x003c
+#define CTRL_SFTRST (1 << 31)
+#define CTRL_CLKGATE (1 << 30)
+#define CTRL_ENUTMILEVEL3 (1 << 15)
+#define CTRL_ENUTMILEVEL2 (1 << 14)
+
+struct usbphy_softc {
+ device_t dev;
+ struct resource *mem_res;
+ u_int phy_num;
+};
+
+static int
+usbphy_detach(device_t dev)
+{
+ struct usbphy_softc *sc;
+
+ sc = device_get_softc(dev);
+
+ if (sc->mem_res != NULL)
+ bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->mem_res);
+
+ return (0);
+}
+
+static int
+usbphy_attach(device_t dev)
+{
+ struct usbphy_softc *sc;
+ int err, regoff, rid;
+
+ sc = device_get_softc(dev);
+ err = 0;
+
+ /* Allocate bus_space resources. */
+ rid = 0;
+ sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
+ RF_ACTIVE);
+ if (sc->mem_res == NULL) {
+ device_printf(dev, "Cannot allocate memory resources\n");
+ err = ENXIO;
+ goto out;
+ }
+
+ /*
+ * XXX Totally lame way to get the unit number (but not quite as lame as
+ * adding an ad-hoc property to the fdt data). This works as long as
+ * this driver is used for imx6 only.
+ */
+ const uint32_t PWD_PHY1_REG_PHYSADDR = 0x020c9000;
+ if (BUS_SPACE_PHYSADDR(sc->mem_res, 0) == PWD_PHY1_REG_PHYSADDR) {
+ sc->phy_num = 0;
+ regoff = 0;
+ } else {
+ sc->phy_num = 1;
+ regoff = 0x60;
+ }
+
+ /*
+ * Based on a note in the u-boot source code, disable charger detection
+ * to avoid degrading the differential signaling on the DP line. Note
+ * that this disables (by design) both charger detection and contact
+ * detection, because of the screwball mix of active-high and active-low
+ * bits in this register.
+ */
+ imx6_anatop_write_4(IMX6_ANALOG_USB1_CHRG_DETECT + regoff,
+ IMX6_ANALOG_USB_CHRG_DETECT_N_ENABLE |
+ IMX6_ANALOG_USB_CHRG_DETECT_N_CHK_CHRG);
+
+ imx6_anatop_write_4(IMX6_ANALOG_USB1_CHRG_DETECT + regoff,
+ IMX6_ANALOG_USB_CHRG_DETECT_N_ENABLE |
+ IMX6_ANALOG_USB_CHRG_DETECT_N_CHK_CHRG);
+
+ /* XXX Configure the overcurrent detection here. */
+
+ /*
+ * Turn on the phy clocks.
+ */
+ imx_ccm_usbphy_enable(dev);
+
+ /*
+ * Set the software reset bit, then clear both it and the clock gate bit
+ * to bring the device out of reset with the clock running.
+ */
+ bus_write_4(sc->mem_res, CTRL_SET_REG, CTRL_SFTRST);
+ bus_write_4(sc->mem_res, CTRL_CLR_REG, CTRL_SFTRST | CTRL_CLKGATE);
+
+ /* Power up: clear all bits in the powerdown register. */
+ bus_write_4(sc->mem_res, PWD_REG, 0);
+
+ err = 0;
+
+out:
+
+ if (err != 0)
+ usbphy_detach(dev);
+
+ return (err);
+}
+
+static int
+usbphy_probe(device_t dev)
+{
+
+ if (ofw_bus_is_compatible(dev, "fsl,imx6q-usbphy") == 0)
+ return (ENXIO);
+
+ device_set_desc(dev, "Freescale i.MX6 USB PHY");
+
+ return (BUS_PROBE_DEFAULT);
+}
+
+static device_method_t usbphy_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_probe, usbphy_probe),
+ DEVMETHOD(device_attach, usbphy_attach),
+ DEVMETHOD(device_detach, usbphy_detach),
+
+ DEVMETHOD_END
+};
+
+static driver_t usbphy_driver = {
+ "usbphy",
+ usbphy_methods,
+ sizeof(struct usbphy_softc)
+};
+
+static devclass_t usbphy_devclass;
+
+DRIVER_MODULE(usbphy, simplebus, usbphy_driver, usbphy_devclass, 0, 0);
+
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