freebsd-dev/sys/dev/usb/controller/generic_ohci.c
Emmanuel Vadot 150c95edfe generic_ehci: Enable all phys and resets
The number of phys and resets is not defined and it controller dependent
so enable/disable every one of them.
2019-10-01 22:20:03 +00:00

349 lines
9.1 KiB
C

/*-
* Copyright (c) 2006 M. Warner Losh.
* Copyright (c) 2016 Emmanuel Vadot <manu@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.
*/
/*
* Generic OHCI driver based on AT91 OHCI
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#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 <machine/bus.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/ohci.h>
#include <dev/usb/controller/ohcireg.h>
#ifdef EXT_RESOURCES
#include <dev/extres/clk/clk.h>
#include <dev/extres/hwreset/hwreset.h>
#include <dev/extres/phy/phy.h>
#include <dev/extres/phy/phy_usb.h>
#endif
#include "generic_usb_if.h"
#ifdef EXT_RESOURCES
struct clk_list {
TAILQ_ENTRY(clk_list) next;
clk_t clk;
};
struct phy_list {
TAILQ_ENTRY(phy_list) next;
phy_t phy;
};
struct hwrst_list {
TAILQ_ENTRY(hwrst_list) next;
hwreset_t rst;
};
#endif
struct generic_ohci_softc {
ohci_softc_t ohci_sc;
#ifdef EXT_RESOURCES
TAILQ_HEAD(, clk_list) clk_list;
TAILQ_HEAD(, phy_list) phy_list;
TAILQ_HEAD(, hwrst_list) rst_list;
#endif
};
static int generic_ohci_detach(device_t);
static int
generic_ohci_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (!ofw_bus_is_compatible(dev, "generic-ohci"))
return (ENXIO);
device_set_desc(dev, "Generic OHCI Controller");
return (BUS_PROBE_DEFAULT);
}
static int
generic_ohci_attach(device_t dev)
{
struct generic_ohci_softc *sc = device_get_softc(dev);
int err, rid;
#ifdef EXT_RESOURCES
int off;
struct clk_list *clkp;
struct phy_list *phyp;
struct hwrst_list *rstp;
clk_t clk;
phy_t phy;
hwreset_t rst;
#endif
sc->ohci_sc.sc_bus.parent = dev;
sc->ohci_sc.sc_bus.devices = sc->ohci_sc.sc_devices;
sc->ohci_sc.sc_bus.devices_max = OHCI_MAX_DEVICES;
sc->ohci_sc.sc_bus.dma_bits = 32;
/* get all DMA memory */
if (usb_bus_mem_alloc_all(&sc->ohci_sc.sc_bus,
USB_GET_DMA_TAG(dev), &ohci_iterate_hw_softc)) {
return (ENOMEM);
}
rid = 0;
sc->ohci_sc.sc_io_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
&rid, RF_ACTIVE);
if (sc->ohci_sc.sc_io_res == 0) {
err = ENOMEM;
goto error;
}
sc->ohci_sc.sc_io_tag = rman_get_bustag(sc->ohci_sc.sc_io_res);
sc->ohci_sc.sc_io_hdl = rman_get_bushandle(sc->ohci_sc.sc_io_res);
sc->ohci_sc.sc_io_size = rman_get_size(sc->ohci_sc.sc_io_res);
rid = 0;
sc->ohci_sc.sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
RF_ACTIVE);
if (sc->ohci_sc.sc_irq_res == 0) {
err = ENXIO;
goto error;
}
sc->ohci_sc.sc_bus.bdev = device_add_child(dev, "usbus", -1);
if (sc->ohci_sc.sc_bus.bdev == 0) {
err = ENXIO;
goto error;
}
device_set_ivars(sc->ohci_sc.sc_bus.bdev, &sc->ohci_sc.sc_bus);
strlcpy(sc->ohci_sc.sc_vendor, "Generic",
sizeof(sc->ohci_sc.sc_vendor));
err = bus_setup_intr(dev, sc->ohci_sc.sc_irq_res,
INTR_TYPE_BIO | INTR_MPSAFE, NULL,
(driver_intr_t *)ohci_interrupt, sc, &sc->ohci_sc.sc_intr_hdl);
if (err) {
sc->ohci_sc.sc_intr_hdl = NULL;
goto error;
}
#ifdef EXT_RESOURCES
TAILQ_INIT(&sc->clk_list);
/* Enable clock */
for (off = 0; clk_get_by_ofw_index(dev, 0, off, &clk) == 0; off++) {
err = clk_enable(clk);
if (err != 0) {
device_printf(dev, "Could not enable clock %s\n",
clk_get_name(clk));
goto error;
}
clkp = malloc(sizeof(*clkp), M_DEVBUF, M_WAITOK | M_ZERO);
clkp->clk = clk;
TAILQ_INSERT_TAIL(&sc->clk_list, clkp, next);
}
/* De-assert reset */
TAILQ_INIT(&sc->rst_list);
for (off = 0; hwreset_get_by_ofw_idx(dev, 0, off, &rst) == 0; off++) {
err = hwreset_deassert(rst);
if (err != 0) {
device_printf(dev, "Could not de-assert reset\n");
goto error;
}
rstp = malloc(sizeof(*rstp), M_DEVBUF, M_WAITOK | M_ZERO);
rstp->rst = rst;
TAILQ_INSERT_TAIL(&sc->rst_list, rstp, next);
}
/* Enable phy */
TAILQ_INIT(&sc->phy_list);
for (off = 0; phy_get_by_ofw_idx(dev, 0, off, &phy) == 0; off++) {
err = phy_usb_set_mode(phy, PHY_USB_MODE_HOST);
if (err != 0) {
device_printf(dev, "Could not set phy to host mode\n");
goto error;
}
err = phy_enable(phy);
if (err != 0) {
device_printf(dev, "Could not enable phy\n");
goto error;
}
phyp = malloc(sizeof(*phyp), M_DEVBUF, M_WAITOK | M_ZERO);
phyp->phy = phy;
TAILQ_INSERT_TAIL(&sc->phy_list, phyp, next);
}
#endif
if (GENERIC_USB_INIT(dev) != 0) {
err = ENXIO;
goto error;
}
err = ohci_init(&sc->ohci_sc);
if (err == 0)
err = device_probe_and_attach(sc->ohci_sc.sc_bus.bdev);
if (err)
goto error;
return (0);
error:
generic_ohci_detach(dev);
return (err);
}
static int
generic_ohci_detach(device_t dev)
{
struct generic_ohci_softc *sc = device_get_softc(dev);
int err;
#ifdef EXT_RESOURCES
struct clk_list *clk, *clk_tmp;
struct phy_list *phy, *phy_tmp;
struct hwrst_list *rst, *rst_tmp;
#endif
/* during module unload there are lots of children leftover */
device_delete_children(dev);
/*
* Put the controller into reset, then disable clocks and do
* the MI tear down. We have to disable the clocks/hardware
* after we do the rest of the teardown. We also disable the
* clocks in the opposite order we acquire them, but that
* doesn't seem to be absolutely necessary. We free up the
* clocks after we disable them, so the system could, in
* theory, reuse them.
*/
bus_space_write_4(sc->ohci_sc.sc_io_tag, sc->ohci_sc.sc_io_hdl,
OHCI_CONTROL, 0);
if (sc->ohci_sc.sc_irq_res && sc->ohci_sc.sc_intr_hdl) {
/*
* only call ohci_detach() after ohci_init()
*/
ohci_detach(&sc->ohci_sc);
err = bus_teardown_intr(dev, sc->ohci_sc.sc_irq_res,
sc->ohci_sc.sc_intr_hdl);
sc->ohci_sc.sc_intr_hdl = NULL;
}
if (sc->ohci_sc.sc_irq_res) {
bus_release_resource(dev, SYS_RES_IRQ, 0,
sc->ohci_sc.sc_irq_res);
sc->ohci_sc.sc_irq_res = NULL;
}
if (sc->ohci_sc.sc_io_res) {
bus_release_resource(dev, SYS_RES_MEMORY, 0,
sc->ohci_sc.sc_io_res);
sc->ohci_sc.sc_io_res = NULL;
}
usb_bus_mem_free_all(&sc->ohci_sc.sc_bus, &ohci_iterate_hw_softc);
#ifdef EXT_RESOURCES
/* Disable phy */
TAILQ_FOREACH_SAFE(phy, &sc->phy_list, next, phy_tmp) {
err = phy_disable(phy->phy);
if (err != 0)
device_printf(dev, "Could not disable phy\n");
phy_release(phy->phy);
TAILQ_REMOVE(&sc->phy_list, phy, next);
free(phy, M_DEVBUF);
}
/* Assert reset */
TAILQ_FOREACH_SAFE(rst, &sc->rst_list, next, rst_tmp) {
hwreset_assert(rst->rst);
hwreset_release(rst->rst);
TAILQ_REMOVE(&sc->rst_list, rst, next);
free(rst, M_DEVBUF);
}
/* Disable clock */
TAILQ_FOREACH_SAFE(clk, &sc->clk_list, next, clk_tmp) {
err = clk_disable(clk->clk);
if (err != 0)
device_printf(dev, "Could not disable clock %s\n",
clk_get_name(clk->clk));
err = clk_release(clk->clk);
if (err != 0)
device_printf(dev, "Could not release clock %s\n",
clk_get_name(clk->clk));
TAILQ_REMOVE(&sc->clk_list, clk, next);
free(clk, M_DEVBUF);
}
#endif
if (GENERIC_USB_DEINIT(dev) != 0)
return (ENXIO);
return (0);
}
static device_method_t generic_ohci_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, generic_ohci_probe),
DEVMETHOD(device_attach, generic_ohci_attach),
DEVMETHOD(device_detach, generic_ohci_detach),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD_END
};
driver_t generic_ohci_driver = {
.name = "ohci",
.methods = generic_ohci_methods,
.size = sizeof(struct generic_ohci_softc),
};
static devclass_t generic_ohci_devclass;
DRIVER_MODULE(ohci, simplebus, generic_ohci_driver,
generic_ohci_devclass, 0, 0);
MODULE_DEPEND(ohci, usb, 1, 1, 1);