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freebsd-skq/sys/arm/samsung/exynos/ehci_exynos5.c
eadler 44c01df173 Fix undefined behavior: (1 << 31) is not defined as 1 is an int and this 
shifts into the sign bit.  Instead use (1U << 31) which gets the
expected result.

This fix is not ideal as it assumes a 32 bit int, but does fix the issue
for most cases.

A similar change was made in OpenBSD.

Discussed with:	-arch, rdivacky
Reviewed by:	cperciva
2013-11-30 22:17:27 +00:00

368 lines
9.3 KiB
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/*-
* Copyright (c) 2013 Ruslan Bukin <br@bsdpad.com>
* 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("$FreeBSD$");
#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/condvar.h>
#include <sys/rman.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_busdma.h>
#include <dev/usb/usb_process.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>
#include <dev/fdt/fdt_common.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include "opt_platform.h"
/* GPIO control */
#define GPIO_CON(x, v) ((v) << ((x) * 4))
#define GPIO_MASK 0xf
#define GPIO_OUTPUT 1
#define GPIO_INPUT 0
#define GPX3CON 0x0C60
#define GPX3DAT 0x0C64
#define PIN_USB 5
/* PWR control */
#define EXYNOS5_PWR_USBHOST_PHY 0x708
#define PHY_POWER_ON 1
#define PHY_POWER_OFF 0
/* SYSREG */
#define EXYNOS5_SYSREG_USB2_PHY 0x230
#define USB2_MODE_HOST 0x1
/* USB HOST */
#define HOST_CTRL_CLK_24MHZ (5 << 16)
#define HOST_CTRL_CLK_MASK (7 << 16)
#define HOST_CTRL_SIDDQ (1 << 6)
#define HOST_CTRL_SLEEP (1 << 5)
#define HOST_CTRL_SUSPEND (1 << 4)
#define HOST_CTRL_RESET_LINK (1 << 1)
#define HOST_CTRL_RESET_PHY (1 << 0)
#define HOST_CTRL_RESET_PHY_ALL (1U << 31)
/* Forward declarations */
static int exynos_ehci_attach(device_t dev);
static int exynos_ehci_detach(device_t dev);
static int exynos_ehci_probe(device_t dev);
struct exynos_ehci_softc {
ehci_softc_t base;
struct resource *res[6];
bus_space_tag_t host_bst;
bus_space_tag_t pwr_bst;
bus_space_tag_t sysreg_bst;
bus_space_tag_t gpio_bst;
bus_space_handle_t host_bsh;
bus_space_handle_t pwr_bsh;
bus_space_handle_t sysreg_bsh;
bus_space_handle_t gpio_bsh;
};
static struct resource_spec exynos_ehci_spec[] = {
{ SYS_RES_MEMORY, 0, RF_ACTIVE },
{ SYS_RES_MEMORY, 1, RF_ACTIVE },
{ SYS_RES_MEMORY, 2, RF_ACTIVE },
{ SYS_RES_MEMORY, 3, RF_ACTIVE },
{ SYS_RES_MEMORY, 4, RF_ACTIVE },
{ SYS_RES_IRQ, 0, RF_ACTIVE },
{ -1, 0 }
};
static device_method_t ehci_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, exynos_ehci_probe),
DEVMETHOD(device_attach, exynos_ehci_attach),
DEVMETHOD(device_detach, exynos_ehci_detach),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
/* Bus interface */
DEVMETHOD(bus_print_child, bus_generic_print_child),
{ 0, 0 }
};
/* kobj_class definition */
static driver_t ehci_driver = {
"ehci",
ehci_methods,
sizeof(ehci_softc_t)
};
static devclass_t ehci_devclass;
DRIVER_MODULE(ehci, simplebus, ehci_driver, ehci_devclass, 0, 0);
MODULE_DEPEND(ehci, usb, 1, 1, 1);
/*
* Public methods
*/
static int
exynos_ehci_probe(device_t dev)
{
if (ofw_bus_is_compatible(dev, "exynos,usb-ehci") == 0)
return (ENXIO);
device_set_desc(dev, "Exynos integrated USB controller");
return (BUS_PROBE_DEFAULT);
}
static int
gpio_ctrl(struct exynos_ehci_softc *esc, int dir, int power)
{
int reg;
/* Power control */
reg = bus_space_read_4(esc->gpio_bst, esc->gpio_bsh, GPX3DAT);
reg &= ~(1 << PIN_USB);
reg |= (power << PIN_USB);
bus_space_write_4(esc->gpio_bst, esc->gpio_bsh, GPX3DAT, reg);
/* Input/Output control */
reg = bus_space_read_4(esc->gpio_bst, esc->gpio_bsh, GPX3CON);
reg &= ~GPIO_CON(PIN_USB, GPIO_MASK);
reg |= GPIO_CON(PIN_USB, dir);
bus_space_write_4(esc->gpio_bst, esc->gpio_bsh, GPX3CON, reg);
return (0);
}
static int
phy_init(struct exynos_ehci_softc *esc)
{
int reg;
gpio_ctrl(esc, GPIO_INPUT, 1);
/* set USB HOST mode */
bus_space_write_4(esc->sysreg_bst, esc->sysreg_bsh,
EXYNOS5_SYSREG_USB2_PHY, USB2_MODE_HOST);
/* Power ON phy */
bus_space_write_4(esc->pwr_bst, esc->pwr_bsh,
EXYNOS5_PWR_USBHOST_PHY, PHY_POWER_ON);
reg = bus_space_read_4(esc->host_bst, esc->host_bsh, 0x0);
reg &= ~(HOST_CTRL_CLK_MASK |
HOST_CTRL_RESET_PHY |
HOST_CTRL_RESET_PHY_ALL |
HOST_CTRL_SIDDQ |
HOST_CTRL_SUSPEND |
HOST_CTRL_SLEEP);
reg |= (HOST_CTRL_CLK_24MHZ |
HOST_CTRL_RESET_LINK);
bus_space_write_4(esc->host_bst, esc->host_bsh, 0x0, reg);
DELAY(10);
reg = bus_space_read_4(esc->host_bst, esc->host_bsh, 0x0);
reg &= ~(HOST_CTRL_RESET_LINK);
bus_space_write_4(esc->host_bst, esc->host_bsh, 0x0, reg);
gpio_ctrl(esc, GPIO_OUTPUT, 1);
return (0);
}
static int
exynos_ehci_attach(device_t dev)
{
struct exynos_ehci_softc *esc;
ehci_softc_t *sc;
bus_space_handle_t bsh;
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;
if (bus_alloc_resources(dev, exynos_ehci_spec, esc->res)) {
device_printf(dev, "could not allocate resources\n");
return (ENXIO);
}
/* 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]);
/* EHCI HOST ctrl registers */
esc->host_bst = rman_get_bustag(esc->res[1]);
esc->host_bsh = rman_get_bushandle(esc->res[1]);
/* PWR registers */
esc->pwr_bst = rman_get_bustag(esc->res[2]);
esc->pwr_bsh = rman_get_bushandle(esc->res[2]);
/* SYSREG */
esc->sysreg_bst = rman_get_bustag(esc->res[3]);
esc->sysreg_bsh = rman_get_bushandle(esc->res[3]);
/* GPIO */
esc->gpio_bst = rman_get_bustag(esc->res[4]);
esc->gpio_bsh = rman_get_bushandle(esc->res[4]);
/* get all DMA memory */
if (usb_bus_mem_alloc_all(&sc->sc_bus, USB_GET_DMA_TAG(dev),
&ehci_iterate_hw_softc))
return (ENXIO);
/*
* Set handle to USB related registers subregion used by
* generic EHCI driver.
*/
err = bus_space_subregion(sc->sc_io_tag, bsh, 0x0,
sc->sc_io_size, &sc->sc_io_hdl);
if (err != 0)
return (ENXIO);
phy_init(esc);
/* Setup interrupt handler */
err = bus_setup_intr(dev, esc->res[5], 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);
return (1);
}
/* Add USB device */
sc->sc_bus.bdev = device_add_child(dev, "usbus", -1);
if (!sc->sc_bus.bdev) {
device_printf(dev, "Could not add USB device\n");
err = bus_teardown_intr(dev, esc->res[5],
sc->sc_intr_hdl);
if (err)
device_printf(dev, "Could not tear down irq,"
" %d\n", err);
return (1);
}
device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
strlcpy(sc->sc_vendor, "Samsung", sizeof(sc->sc_vendor));
err = ehci_init(sc);
if (!err) {
sc->sc_flags |= EHCI_SCFLG_DONEINIT;
err = device_probe_and_attach(sc->sc_bus.bdev);
} else {
device_printf(dev, "USB init failed err=%d\n", err);
device_delete_child(dev, sc->sc_bus.bdev);
sc->sc_bus.bdev = NULL;
err = bus_teardown_intr(dev, esc->res[5],
sc->sc_intr_hdl);
if (err)
device_printf(dev, "Could not tear down irq,"
" %d\n", err);
return (1);
}
return (0);
}
static int
exynos_ehci_detach(device_t dev)
{
struct exynos_ehci_softc *esc;
ehci_softc_t *sc;
int err;
esc = device_get_softc(dev);
sc = &esc->base;
if (sc->sc_flags & EHCI_SCFLG_DONEINIT)
return (0);
/*
* only call ehci_detach() after ehci_init()
*/
if (sc->sc_flags & EHCI_SCFLG_DONEINIT) {
ehci_detach(sc);
sc->sc_flags &= ~EHCI_SCFLG_DONEINIT;
}
/*
* Disable interrupts that might have been switched on in
* ehci_init.
*/
if (sc->sc_io_tag && sc->sc_io_hdl)
bus_space_write_4(sc->sc_io_tag, sc->sc_io_hdl,
EHCI_USBINTR, 0);
if (esc->res[5] && sc->sc_intr_hdl) {
err = bus_teardown_intr(dev, esc->res[5],
sc->sc_intr_hdl);
if (err) {
device_printf(dev, "Could not tear down irq,"
" %d\n", err);
return (err);
}
sc->sc_intr_hdl = NULL;
}
if (sc->sc_bus.bdev) {
device_delete_child(dev, sc->sc_bus.bdev);
sc->sc_bus.bdev = NULL;
}
/* During module unload there are lots of children leftover */
device_delete_children(dev);
bus_release_resources(dev, exynos_ehci_spec, esc->res);
return (0);
}
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