429 lines
12 KiB
C
429 lines
12 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2013 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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/*
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* Vybrid Family Universal Serial Bus (USB) Controller
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* Chapter 44-45, Vybrid Reference Manual, Rev. 5, 07/2013
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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/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 "gpio_if.h"
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#include "opt_platform.h"
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#define ENUTMILEVEL3 (1 << 15)
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#define ENUTMILEVEL2 (1 << 14)
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#define GPIO_USB_PWR 134
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#define USB_ID 0x000 /* Identification register */
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#define USB_HWGENERAL 0x004 /* Hardware General */
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#define USB_HWHOST 0x008 /* Host Hardware Parameters */
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#define USB_HWDEVICE 0x00C /* Device Hardware Parameters */
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#define USB_HWTXBUF 0x010 /* TX Buffer Hardware Parameters */
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#define USB_HWRXBUF 0x014 /* RX Buffer Hardware Parameters */
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#define USB_HCSPARAMS 0x104 /* Host Controller Structural Parameters */
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#define USBPHY_PWD 0x00 /* PHY Power-Down Register */
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#define USBPHY_PWD_SET 0x04 /* PHY Power-Down Register */
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#define USBPHY_PWD_CLR 0x08 /* PHY Power-Down Register */
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#define USBPHY_PWD_TOG 0x0C /* PHY Power-Down Register */
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#define USBPHY_TX 0x10 /* PHY Transmitter Control Register */
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#define USBPHY_RX 0x20 /* PHY Receiver Control Register */
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#define USBPHY_RX_SET 0x24 /* PHY Receiver Control Register */
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#define USBPHY_RX_CLR 0x28 /* PHY Receiver Control Register */
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#define USBPHY_RX_TOG 0x2C /* PHY Receiver Control Register */
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#define USBPHY_CTRL 0x30 /* PHY General Control Register */
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#define USBPHY_CTRL_SET 0x34 /* PHY General Control Register */
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#define USBPHY_CTRL_CLR 0x38 /* PHY General Control Register */
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#define USBPHY_CTRL_TOG 0x3C /* PHY General Control Register */
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#define USBPHY_STATUS 0x40 /* PHY Status Register */
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#define USBPHY_DEBUG 0x50 /* PHY Debug Register */
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#define USBPHY_DEBUG_SET 0x54 /* PHY Debug Register */
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#define USBPHY_DEBUG_CLR 0x58 /* PHY Debug Register */
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#define USBPHY_DEBUG_TOG 0x5C /* PHY Debug Register */
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#define USBPHY_DEBUG0_STATUS 0x60 /* UTMI Debug Status Register 0 */
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#define USBPHY_DEBUG1 0x70 /* UTMI Debug Status Register 1 */
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#define USBPHY_DEBUG1_SET 0x74 /* UTMI Debug Status Register 1 */
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#define USBPHY_DEBUG1_CLR 0x78 /* UTMI Debug Status Register 1 */
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#define USBPHY_DEBUG1_TOG 0x7C /* UTMI Debug Status Register 1 */
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#define USBPHY_VERSION 0x80 /* UTMI RTL Version */
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#define USBPHY_IP 0x90 /* PHY IP Block Register */
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#define USBPHY_IP_SET 0x94 /* PHY IP Block Register */
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#define USBPHY_IP_CLR 0x98 /* PHY IP Block Register */
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#define USBPHY_IP_TOG 0x9C /* PHY IP Block Register */
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#define USBPHY_CTRL_SFTRST (1U << 31)
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#define USBPHY_CTRL_CLKGATE (1 << 30)
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#define USBPHY_DEBUG_CLKGATE (1 << 30)
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#define PHY_READ4(_sc, _reg) \
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bus_space_read_4(_sc->bst_phy, _sc->bsh_phy, _reg)
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#define PHY_WRITE4(_sc, _reg, _val) \
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bus_space_write_4(_sc->bst_phy, _sc->bsh_phy, _reg, _val)
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#define USBC_READ4(_sc, _reg) \
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bus_space_read_4(_sc->bst_usbc, _sc->bsh_usbc, _reg)
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#define USBC_WRITE4(_sc, _reg, _val) \
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bus_space_write_4(_sc->bst_usbc, _sc->bsh_usbc, _reg, _val)
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/* Forward declarations */
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static int vybrid_ehci_attach(device_t dev);
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static int vybrid_ehci_detach(device_t dev);
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static int vybrid_ehci_probe(device_t dev);
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struct vybrid_ehci_softc {
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ehci_softc_t base;
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device_t dev;
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struct resource *res[6];
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bus_space_tag_t bst_phy;
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bus_space_handle_t bsh_phy;
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bus_space_tag_t bst_usbc;
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bus_space_handle_t bsh_usbc;
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};
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static struct resource_spec vybrid_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, vybrid_ehci_probe),
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DEVMETHOD(device_attach, vybrid_ehci_attach),
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DEVMETHOD(device_detach, vybrid_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(ehci_softc_t)
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};
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static devclass_t ehci_devclass;
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DRIVER_MODULE(vybrid_ehci, simplebus, ehci_driver, ehci_devclass, 0, 0);
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MODULE_DEPEND(vybrid_ehci, usb, 1, 1, 1);
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static void
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vybrid_ehci_post_reset(struct ehci_softc *ehci_softc)
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{
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uint32_t usbmode;
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/* Force HOST mode */
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usbmode = EOREAD4(ehci_softc, EHCI_USBMODE_NOLPM);
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usbmode &= ~EHCI_UM_CM;
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usbmode |= EHCI_UM_CM_HOST;
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EOWRITE4(ehci_softc, EHCI_USBMODE_NOLPM, usbmode);
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}
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/*
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* Public methods
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*/
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static int
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vybrid_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, "fsl,mvf600-usb-ehci") == 0)
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return (ENXIO);
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device_set_desc(dev, "Vybrid Family 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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phy_init(struct vybrid_ehci_softc *esc)
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{
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device_t sc_gpio_dev;
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int reg;
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/* Reset phy */
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reg = PHY_READ4(esc, USBPHY_CTRL);
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reg |= (USBPHY_CTRL_SFTRST);
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PHY_WRITE4(esc, USBPHY_CTRL, reg);
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/* Minimum reset time */
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DELAY(10000);
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reg &= ~(USBPHY_CTRL_SFTRST | USBPHY_CTRL_CLKGATE);
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PHY_WRITE4(esc, USBPHY_CTRL, reg);
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reg = (ENUTMILEVEL2 | ENUTMILEVEL3);
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PHY_WRITE4(esc, USBPHY_CTRL_SET, reg);
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/* Get the GPIO device, we need this to give power to USB */
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sc_gpio_dev = devclass_get_device(devclass_find("gpio"), 0);
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if (sc_gpio_dev == NULL) {
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device_printf(esc->dev, "Error: failed to get the GPIO dev\n");
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return (1);
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}
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/* Give power to USB */
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GPIO_PIN_SETFLAGS(sc_gpio_dev, GPIO_USB_PWR, GPIO_PIN_OUTPUT);
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GPIO_PIN_SET(sc_gpio_dev, GPIO_USB_PWR, GPIO_PIN_HIGH);
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/* Power up PHY */
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PHY_WRITE4(esc, USBPHY_PWD, 0x00);
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/* Ungate clocks */
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reg = PHY_READ4(esc, USBPHY_DEBUG);
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reg &= ~(USBPHY_DEBUG_CLKGATE);
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PHY_WRITE4(esc, USBPHY_DEBUG, reg);
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#if 0
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printf("USBPHY_CTRL == 0x%08x\n",
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PHY_READ4(esc, USBPHY_CTRL));
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printf("USBPHY_IP == 0x%08x\n",
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PHY_READ4(esc, USBPHY_IP));
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printf("USBPHY_STATUS == 0x%08x\n",
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PHY_READ4(esc, USBPHY_STATUS));
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printf("USBPHY_DEBUG == 0x%08x\n",
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PHY_READ4(esc, USBPHY_DEBUG));
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printf("USBPHY_DEBUG0_STATUS == 0x%08x\n",
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PHY_READ4(esc, USBPHY_DEBUG0_STATUS));
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printf("USBPHY_DEBUG1 == 0x%08x\n",
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PHY_READ4(esc, USBPHY_DEBUG1));
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#endif
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return (0);
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}
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static int
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vybrid_ehci_attach(device_t dev)
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{
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struct vybrid_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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int reg;
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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, vybrid_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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esc->bst_usbc = rman_get_bustag(esc->res[1]);
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esc->bsh_usbc = rman_get_bushandle(esc->res[1]);
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esc->bst_phy = rman_get_bustag(esc->res[2]);
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esc->bsh_phy = 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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#if 0
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printf("USBx_HCSPARAMS is 0x%08x\n",
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bus_space_read_4(sc->sc_io_tag, bsh, USB_HCSPARAMS));
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printf("USB_ID == 0x%08x\n",
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bus_space_read_4(sc->sc_io_tag, bsh, USB_ID));
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printf("USB_HWGENERAL == 0x%08x\n",
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bus_space_read_4(sc->sc_io_tag, bsh, USB_HWGENERAL));
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printf("USB_HWHOST == 0x%08x\n",
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bus_space_read_4(sc->sc_io_tag, bsh, USB_HWHOST));
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printf("USB_HWDEVICE == 0x%08x\n",
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bus_space_read_4(sc->sc_io_tag, bsh, USB_HWDEVICE));
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printf("USB_HWTXBUF == 0x%08x\n",
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bus_space_read_4(sc->sc_io_tag, bsh, USB_HWTXBUF));
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printf("USB_HWRXBUF == 0x%08x\n",
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bus_space_read_4(sc->sc_io_tag, bsh, USB_HWRXBUF));
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#endif
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if (phy_init(esc)) {
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device_printf(dev, "Could not setup PHY\n");
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return (1);
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}
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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, 0x100,
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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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/* 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[5],
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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, "Freescale", sizeof(sc->sc_vendor));
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/* Set host mode */
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reg = bus_space_read_4(sc->sc_io_tag, sc->sc_io_hdl, 0xA8);
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reg |= 0x3;
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bus_space_write_4(sc->sc_io_tag, sc->sc_io_hdl, 0xA8, reg);
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/* Set flags and callbacks*/
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sc->sc_flags |= EHCI_SCFLG_TT | EHCI_SCFLG_NORESTERM;
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sc->sc_vendor_post_reset = vybrid_ehci_post_reset;
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sc->sc_vendor_get_port_speed = ehci_get_port_speed_portsc;
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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[5],
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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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vybrid_ehci_detach(device_t dev)
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{
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struct vybrid_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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/* First detach all children; we can't detach if that fails. */
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if ((err = device_delete_children(dev)) != 0)
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return (err);
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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[5] && sc->sc_intr_hdl) {
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err = bus_teardown_intr(dev, esc->res[5],
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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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usb_bus_mem_free_all(&sc->sc_bus, &ehci_iterate_hw_softc);
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bus_release_resources(dev, vybrid_ehci_spec, esc->res);
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return (0);
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}
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