256 lines
6.4 KiB
C
256 lines
6.4 KiB
C
/*-
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* Copyright (c) 2012 Ganbold Tsagaankhuu <ganbold@freebsd.org>
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* Copyright (c) 2016 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Andrew Turner under
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* sponsorship from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_bus.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/condvar.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <dev/usb/usb.h>
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#include <dev/usb/usbdi.h>
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#include <dev/usb/usb_core.h>
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#include <dev/usb/usb_busdma.h>
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#include <dev/usb/usb_process.h>
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#include <dev/usb/usb_controller.h>
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#include <dev/usb/usb_bus.h>
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#include <dev/usb/controller/ehci.h>
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#include <dev/fdt/fdt_common.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#ifdef EXT_RESOURCES
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#include <dev/extres/clk/clk.h>
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#include <dev/extres/hwreset/hwreset.h>
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#include <dev/extres/phy/phy.h>
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#include <dev/extres/phy/phy_usb.h>
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#endif
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#include "generic_ehci.h"
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#ifdef EXT_RESOURCES
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struct clk_list {
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TAILQ_ENTRY(clk_list) next;
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clk_t clk;
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};
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struct hwrst_list {
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TAILQ_ENTRY(hwrst_list) next;
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hwreset_t rst;
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};
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struct phy_list {
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TAILQ_ENTRY(phy_list) next;
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phy_t phy;
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};
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#endif
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struct generic_ehci_fdt_softc {
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ehci_softc_t ehci_sc;
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#ifdef EXT_RESOURCES
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TAILQ_HEAD(, clk_list) clk_list;
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TAILQ_HEAD(, hwrst_list) rst_list;
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TAILQ_HEAD(, phy_list) phy_list;
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#endif
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};
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static device_probe_t generic_ehci_fdt_probe;
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static device_attach_t generic_ehci_fdt_attach;
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static device_detach_t generic_ehci_fdt_detach;
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static int
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generic_ehci_fdt_probe(device_t self)
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{
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if (!ofw_bus_status_okay(self))
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return (ENXIO);
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if (!ofw_bus_is_compatible(self, "generic-ehci"))
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return (ENXIO);
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device_set_desc(self, "Generic EHCI Controller");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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generic_ehci_fdt_attach(device_t dev)
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{
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int err;
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#ifdef EXT_RESOURCES
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struct generic_ehci_fdt_softc *sc;
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struct clk_list *clkp;
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clk_t clk;
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struct hwrst_list *rstp;
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hwreset_t rst;
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struct phy_list *phyp;
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phy_t phy;
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int off;
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sc = device_get_softc(dev);
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TAILQ_INIT(&sc->clk_list);
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/* Enable clock */
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for (off = 0; clk_get_by_ofw_index(dev, 0, off, &clk) == 0; off++) {
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err = clk_enable(clk);
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if (err != 0) {
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device_printf(dev, "Could not enable clock %s\n",
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clk_get_name(clk));
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goto error;
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}
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clkp = malloc(sizeof(*clkp), M_DEVBUF, M_WAITOK | M_ZERO);
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clkp->clk = clk;
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TAILQ_INSERT_TAIL(&sc->clk_list, clkp, next);
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}
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/* De-assert reset */
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TAILQ_INIT(&sc->rst_list);
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for (off = 0; hwreset_get_by_ofw_idx(dev, 0, off, &rst) == 0; off++) {
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err = hwreset_deassert(rst);
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if (err != 0) {
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device_printf(dev, "Could not de-assert reset\n");
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goto error;
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}
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rstp = malloc(sizeof(*rstp), M_DEVBUF, M_WAITOK | M_ZERO);
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rstp->rst = rst;
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TAILQ_INSERT_TAIL(&sc->rst_list, rstp, next);
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}
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/* Enable USB PHY */
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TAILQ_INIT(&sc->phy_list);
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for (off = 0; phy_get_by_ofw_idx(dev, 0, off, &phy) == 0; off++) {
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err = phy_usb_set_mode(phy, PHY_USB_MODE_HOST);
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if (err != 0) {
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device_printf(dev, "Could not set phy to host mode\n");
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goto error;
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}
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err = phy_enable(phy);
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if (err != 0) {
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device_printf(dev, "Could not enable phy\n");
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goto error;
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}
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phyp = malloc(sizeof(*phyp), M_DEVBUF, M_WAITOK | M_ZERO);
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phyp->phy = phy;
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TAILQ_INSERT_TAIL(&sc->phy_list, phyp, next);
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}
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#endif
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err = generic_ehci_attach(dev);
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if (err != 0)
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goto error;
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return (0);
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error:
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generic_ehci_fdt_detach(dev);
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return (err);
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}
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static int
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generic_ehci_fdt_detach(device_t dev)
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{
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#ifdef EXT_RESOURCES
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struct generic_ehci_fdt_softc *sc;
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struct clk_list *clk, *clk_tmp;
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struct hwrst_list *rst, *rst_tmp;
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struct phy_list *phy, *phy_tmp;
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#endif
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int err;
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err = generic_ehci_detach(dev);
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if (err != 0)
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return (err);
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#ifdef EXT_RESOURCES
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sc = device_get_softc(dev);
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/* Disable clock */
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TAILQ_FOREACH_SAFE(clk, &sc->clk_list, next, clk_tmp) {
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err = clk_disable(clk->clk);
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if (err != 0)
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device_printf(dev, "Could not disable clock %s\n",
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clk_get_name(clk->clk));
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err = clk_release(clk->clk);
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if (err != 0)
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device_printf(dev, "Could not release clock %s\n",
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clk_get_name(clk->clk));
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TAILQ_REMOVE(&sc->clk_list, clk, next);
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free(clk, M_DEVBUF);
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}
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/* Assert reset */
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TAILQ_FOREACH_SAFE(rst, &sc->rst_list, next, rst_tmp) {
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hwreset_assert(rst->rst);
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hwreset_release(rst->rst);
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TAILQ_REMOVE(&sc->rst_list, rst, next);
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free(rst, M_DEVBUF);
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}
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/* Disable phys */
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TAILQ_FOREACH_SAFE(phy, &sc->phy_list, next, phy_tmp) {
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err = phy_disable(phy->phy);
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if (err != 0)
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device_printf(dev, "Could not disable phy\n");
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phy_release(phy->phy);
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TAILQ_REMOVE(&sc->phy_list, phy, next);
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free(phy, M_DEVBUF);
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}
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#endif
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return (0);
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}
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static device_method_t ehci_fdt_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, generic_ehci_fdt_probe),
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DEVMETHOD(device_attach, generic_ehci_fdt_attach),
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DEVMETHOD(device_detach, generic_ehci_fdt_detach),
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DEVMETHOD_END
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};
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DEFINE_CLASS_1(ehci, ehci_fdt_driver, ehci_fdt_methods,
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sizeof(ehci_softc_t), generic_ehci_driver);
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static devclass_t ehci_fdt_devclass;
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DRIVER_MODULE(generic_ehci, simplebus, ehci_fdt_driver, ehci_fdt_devclass, 0, 0);
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MODULE_DEPEND(generic_ehci, usb, 1, 1, 1);
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