6a5289b068
Create new driver which initializes Arndale PHY and calls ehci_init Reviewed by: hselasky Submitted by: Wojciech Macek <wma@semihalf.com> Obtained from: Semihalf Sponsored by: Juniper Networks Inc. Differential Revision: https://reviews.freebsd.org/D4192
399 lines
9.7 KiB
C
399 lines
9.7 KiB
C
/*-
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* Copyright (c) 2013-2014 Ruslan Bukin <br@bsdpad.com>
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* All rights reserved.
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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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#ifdef USB_GLOBAL_INCLUDE_FILE
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#include USB_GLOBAL_INCLUDE_FILE
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#else
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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/kernel.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <sys/condvar.h>
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#include <sys/rman.h>
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#include <sys/gpio.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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#include <dev/usb/usb.h>
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#include <dev/usb/usbdi.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/usb/controller/ehcireg.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <arm/samsung/exynos/exynos5_common.h>
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#include <arm/samsung/exynos/exynos5_pmu.h>
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#include "gpio_if.h"
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#include "opt_platform.h"
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#endif
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/* GPIO control */
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#define GPIO_OUTPUT 1
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#define GPIO_INPUT 0
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#define PIN_USB 161
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/* SYSREG */
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#define EXYNOS5_SYSREG_USB2_PHY 0x0
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#define USB2_MODE_HOST 0x1
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/* USB HOST */
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#define HOST_CTRL_CLK_24MHZ (5 << 16)
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#define HOST_CTRL_CLK_MASK (7 << 16)
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#define HOST_CTRL_SIDDQ (1 << 6)
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#define HOST_CTRL_SLEEP (1 << 5)
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#define HOST_CTRL_SUSPEND (1 << 4)
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#define HOST_CTRL_RESET_LINK (1 << 1)
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#define HOST_CTRL_RESET_PHY (1 << 0)
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#define HOST_CTRL_RESET_PHY_ALL (1U << 31)
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/* Forward declarations */
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static int exynos_ehci_attach(device_t dev);
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static int exynos_ehci_detach(device_t dev);
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static int exynos_ehci_probe(device_t dev);
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struct exynos_ehci_softc {
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device_t dev;
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ehci_softc_t base;
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struct resource *res[4];
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bus_space_tag_t host_bst;
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bus_space_tag_t sysreg_bst;
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bus_space_handle_t host_bsh;
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bus_space_handle_t sysreg_bsh;
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};
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static struct resource_spec exynos_ehci_spec[] = {
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{ SYS_RES_MEMORY, 0, RF_ACTIVE },
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{ SYS_RES_MEMORY, 1, RF_ACTIVE },
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{ SYS_RES_MEMORY, 2, RF_ACTIVE },
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{ SYS_RES_IRQ, 0, RF_ACTIVE },
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{ -1, 0 }
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};
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static device_method_t ehci_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, exynos_ehci_probe),
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DEVMETHOD(device_attach, exynos_ehci_attach),
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DEVMETHOD(device_detach, exynos_ehci_detach),
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DEVMETHOD(device_suspend, bus_generic_suspend),
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DEVMETHOD(device_resume, bus_generic_resume),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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/* Bus interface */
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DEVMETHOD(bus_print_child, bus_generic_print_child),
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{ 0, 0 }
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};
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/* kobj_class definition */
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static driver_t ehci_driver = {
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"ehci",
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ehci_methods,
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sizeof(struct exynos_ehci_softc)
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};
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static devclass_t ehci_devclass;
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DRIVER_MODULE(ehci, simplebus, ehci_driver, ehci_devclass, 0, 0);
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MODULE_DEPEND(ehci, usb, 1, 1, 1);
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/*
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* Public methods
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*/
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static int
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exynos_ehci_probe(device_t dev)
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{
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if (!ofw_bus_status_okay(dev))
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return (ENXIO);
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if (ofw_bus_is_compatible(dev, "exynos,usb-ehci") == 0)
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return (ENXIO);
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device_set_desc(dev, "Exynos integrated USB controller");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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gpio_ctrl(struct exynos_ehci_softc *esc, int dir, int power)
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{
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device_t gpio_dev;
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/* Get the GPIO device, we need this to give power to USB */
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gpio_dev = devclass_get_device(devclass_find("gpio"), 0);
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if (gpio_dev == NULL) {
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device_printf(esc->dev, "cant find gpio_dev\n");
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return (1);
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}
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if (power)
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GPIO_PIN_SET(gpio_dev, PIN_USB, GPIO_PIN_HIGH);
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else
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GPIO_PIN_SET(gpio_dev, PIN_USB, GPIO_PIN_LOW);
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if (dir)
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GPIO_PIN_SETFLAGS(gpio_dev, PIN_USB, GPIO_PIN_OUTPUT);
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else
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GPIO_PIN_SETFLAGS(gpio_dev, PIN_USB, GPIO_PIN_INPUT);
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return (0);
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}
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static int
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reset_hsic_hub(struct exynos_ehci_softc *esc, phandle_t hub)
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{
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device_t gpio_dev;
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pcell_t pin;
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/* TODO: check that hub is compatible with "smsc,usb3503" */
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if (!OF_hasprop(hub, "freebsd,reset-gpio")) {
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return (1);
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}
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if (OF_getencprop(hub, "freebsd,reset-gpio", &pin, sizeof(pin)) < 0) {
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device_printf(esc->dev,
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"failed to decode reset GPIO pin number for HSIC hub\n");
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return (1);
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}
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/* Get the GPIO device, we need this to give power to USB */
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gpio_dev = devclass_get_device(devclass_find("gpio"), 0);
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if (gpio_dev == NULL) {
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device_printf(esc->dev, "Cant find gpio device\n");
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return (1);
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}
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GPIO_PIN_SET(gpio_dev, pin, GPIO_PIN_LOW);
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DELAY(100);
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GPIO_PIN_SET(gpio_dev, pin, GPIO_PIN_HIGH);
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return (0);
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}
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static int
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phy_init(struct exynos_ehci_softc *esc)
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{
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int reg;
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phandle_t hub;
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gpio_ctrl(esc, GPIO_INPUT, 1);
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/* set USB HOST mode */
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bus_space_write_4(esc->sysreg_bst, esc->sysreg_bsh,
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EXYNOS5_SYSREG_USB2_PHY, USB2_MODE_HOST);
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/* Power ON phy */
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usb2_phy_power_on();
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reg = bus_space_read_4(esc->host_bst, esc->host_bsh, 0x0);
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reg &= ~(HOST_CTRL_CLK_MASK |
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HOST_CTRL_RESET_PHY |
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HOST_CTRL_RESET_PHY_ALL |
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HOST_CTRL_SIDDQ |
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HOST_CTRL_SUSPEND |
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HOST_CTRL_SLEEP);
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reg |= (HOST_CTRL_CLK_24MHZ |
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HOST_CTRL_RESET_LINK);
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bus_space_write_4(esc->host_bst, esc->host_bsh, 0x0, reg);
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DELAY(10);
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reg = bus_space_read_4(esc->host_bst, esc->host_bsh, 0x0);
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reg &= ~(HOST_CTRL_RESET_LINK);
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bus_space_write_4(esc->host_bst, esc->host_bsh, 0x0, reg);
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if ((hub = OF_finddevice("/hsichub")) != 0) {
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reset_hsic_hub(esc, hub);
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}
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gpio_ctrl(esc, GPIO_OUTPUT, 1);
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return (0);
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}
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static int
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exynos_ehci_attach(device_t dev)
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{
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struct exynos_ehci_softc *esc;
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ehci_softc_t *sc;
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bus_space_handle_t bsh;
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int err;
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esc = device_get_softc(dev);
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esc->dev = dev;
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sc = &esc->base;
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sc->sc_bus.parent = dev;
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sc->sc_bus.devices = sc->sc_devices;
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sc->sc_bus.devices_max = EHCI_MAX_DEVICES;
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sc->sc_bus.dma_bits = 32;
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if (bus_alloc_resources(dev, exynos_ehci_spec, esc->res)) {
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device_printf(dev, "could not allocate resources\n");
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return (ENXIO);
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}
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/* EHCI registers */
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sc->sc_io_tag = rman_get_bustag(esc->res[0]);
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bsh = rman_get_bushandle(esc->res[0]);
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sc->sc_io_size = rman_get_size(esc->res[0]);
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/* EHCI HOST ctrl registers */
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esc->host_bst = rman_get_bustag(esc->res[1]);
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esc->host_bsh = rman_get_bushandle(esc->res[1]);
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/* SYSREG */
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esc->sysreg_bst = rman_get_bustag(esc->res[2]);
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esc->sysreg_bsh = rman_get_bushandle(esc->res[2]);
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/* get all DMA memory */
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if (usb_bus_mem_alloc_all(&sc->sc_bus, USB_GET_DMA_TAG(dev),
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&ehci_iterate_hw_softc))
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return (ENXIO);
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/*
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* Set handle to USB related registers subregion used by
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* generic EHCI driver.
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*/
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err = bus_space_subregion(sc->sc_io_tag, bsh, 0x0,
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sc->sc_io_size, &sc->sc_io_hdl);
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if (err != 0)
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return (ENXIO);
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phy_init(esc);
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/* Setup interrupt handler */
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err = bus_setup_intr(dev, esc->res[3], INTR_TYPE_BIO | INTR_MPSAFE,
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NULL, (driver_intr_t *)ehci_interrupt, sc,
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&sc->sc_intr_hdl);
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if (err) {
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device_printf(dev, "Could not setup irq, "
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"%d\n", err);
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return (1);
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}
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/* Add USB device */
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sc->sc_bus.bdev = device_add_child(dev, "usbus", -1);
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if (!sc->sc_bus.bdev) {
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device_printf(dev, "Could not add USB device\n");
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err = bus_teardown_intr(dev, esc->res[3],
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sc->sc_intr_hdl);
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if (err)
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device_printf(dev, "Could not tear down irq,"
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" %d\n", err);
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return (1);
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}
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device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
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strlcpy(sc->sc_vendor, "Samsung", sizeof(sc->sc_vendor));
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err = ehci_init(sc);
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if (!err) {
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sc->sc_flags |= EHCI_SCFLG_DONEINIT;
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err = device_probe_and_attach(sc->sc_bus.bdev);
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} else {
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device_printf(dev, "USB init failed err=%d\n", err);
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device_delete_child(dev, sc->sc_bus.bdev);
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sc->sc_bus.bdev = NULL;
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err = bus_teardown_intr(dev, esc->res[3],
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sc->sc_intr_hdl);
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if (err)
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device_printf(dev, "Could not tear down irq,"
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" %d\n", err);
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return (1);
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}
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return (0);
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}
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static int
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exynos_ehci_detach(device_t dev)
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{
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struct exynos_ehci_softc *esc;
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ehci_softc_t *sc;
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int err;
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esc = device_get_softc(dev);
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sc = &esc->base;
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if (sc->sc_flags & EHCI_SCFLG_DONEINIT)
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return (0);
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/*
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* only call ehci_detach() after ehci_init()
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*/
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if (sc->sc_flags & EHCI_SCFLG_DONEINIT) {
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ehci_detach(sc);
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sc->sc_flags &= ~EHCI_SCFLG_DONEINIT;
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}
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/*
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* Disable interrupts that might have been switched on in
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* ehci_init.
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*/
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if (sc->sc_io_tag && sc->sc_io_hdl)
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bus_space_write_4(sc->sc_io_tag, sc->sc_io_hdl,
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EHCI_USBINTR, 0);
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if (esc->res[3] && sc->sc_intr_hdl) {
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err = bus_teardown_intr(dev, esc->res[3],
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sc->sc_intr_hdl);
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if (err) {
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device_printf(dev, "Could not tear down irq,"
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" %d\n", err);
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return (err);
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}
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sc->sc_intr_hdl = NULL;
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}
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if (sc->sc_bus.bdev) {
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device_delete_child(dev, sc->sc_bus.bdev);
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sc->sc_bus.bdev = NULL;
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}
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/* During module unload there are lots of children leftover */
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device_delete_children(dev);
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bus_release_resources(dev, exynos_ehci_spec, esc->res);
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return (0);
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}
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