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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.
*/
/*
* Vybrid Family Universal Serial Bus (USB) Controller
* Chapter 44-45, Vybrid Reference Manual, Rev. 5, 07/2013
*/
#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 <sys/gpio.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 "gpio_if.h"
#include "opt_platform.h"
#define ENUTMILEVEL3 (1 << 15)
#define ENUTMILEVEL2 (1 << 14)
#define GPIO_USB_PWR 134
#define USB_ID 0x000 /* Identification register */
#define USB_HWGENERAL 0x004 /* Hardware General */
#define USB_HWHOST 0x008 /* Host Hardware Parameters */
#define USB_HWDEVICE 0x00C /* Device Hardware Parameters */
#define USB_HWTXBUF 0x010 /* TX Buffer Hardware Parameters */
#define USB_HWRXBUF 0x014 /* RX Buffer Hardware Parameters */
#define USB_HCSPARAMS 0x104 /* Host Controller Structural Parameters */
#define USBPHY_PWD 0x00 /* PHY Power-Down Register */
#define USBPHY_PWD_SET 0x04 /* PHY Power-Down Register */
#define USBPHY_PWD_CLR 0x08 /* PHY Power-Down Register */
#define USBPHY_PWD_TOG 0x0C /* PHY Power-Down Register */
#define USBPHY_TX 0x10 /* PHY Transmitter Control Register */
#define USBPHY_RX 0x20 /* PHY Receiver Control Register */
#define USBPHY_RX_SET 0x24 /* PHY Receiver Control Register */
#define USBPHY_RX_CLR 0x28 /* PHY Receiver Control Register */
#define USBPHY_RX_TOG 0x2C /* PHY Receiver Control Register */
#define USBPHY_CTRL 0x30 /* PHY General Control Register */
#define USBPHY_CTRL_SET 0x34 /* PHY General Control Register */
#define USBPHY_CTRL_CLR 0x38 /* PHY General Control Register */
#define USBPHY_CTRL_TOG 0x3C /* PHY General Control Register */
#define USBPHY_STATUS 0x40 /* PHY Status Register */
#define USBPHY_DEBUG 0x50 /* PHY Debug Register */
#define USBPHY_DEBUG_SET 0x54 /* PHY Debug Register */
#define USBPHY_DEBUG_CLR 0x58 /* PHY Debug Register */
#define USBPHY_DEBUG_TOG 0x5C /* PHY Debug Register */
#define USBPHY_DEBUG0_STATUS 0x60 /* UTMI Debug Status Register 0 */
#define USBPHY_DEBUG1 0x70 /* UTMI Debug Status Register 1 */
#define USBPHY_DEBUG1_SET 0x74 /* UTMI Debug Status Register 1 */
#define USBPHY_DEBUG1_CLR 0x78 /* UTMI Debug Status Register 1 */
#define USBPHY_DEBUG1_TOG 0x7C /* UTMI Debug Status Register 1 */
#define USBPHY_VERSION 0x80 /* UTMI RTL Version */
#define USBPHY_IP 0x90 /* PHY IP Block Register */
#define USBPHY_IP_SET 0x94 /* PHY IP Block Register */
#define USBPHY_IP_CLR 0x98 /* PHY IP Block Register */
#define USBPHY_IP_TOG 0x9C /* PHY IP Block Register */
#define USBPHY_CTRL_SFTRST (1U << 31)
#define USBPHY_CTRL_CLKGATE (1 << 30)
#define USBPHY_DEBUG_CLKGATE (1 << 30)
#define PHY_READ4(_sc, _reg) \
bus_space_read_4(_sc->bst_phy, _sc->bsh_phy, _reg)
#define PHY_WRITE4(_sc, _reg, _val) \
bus_space_write_4(_sc->bst_phy, _sc->bsh_phy, _reg, _val)
#define USBC_READ4(_sc, _reg) \
bus_space_read_4(_sc->bst_usbc, _sc->bsh_usbc, _reg)
#define USBC_WRITE4(_sc, _reg, _val) \
bus_space_write_4(_sc->bst_usbc, _sc->bsh_usbc, _reg, _val)
/* Forward declarations */
static int vybrid_ehci_attach(device_t dev);
static int vybrid_ehci_detach(device_t dev);
static int vybrid_ehci_probe(device_t dev);
struct vybrid_ehci_softc {
ehci_softc_t base;
device_t dev;
struct resource *res[6];
bus_space_tag_t bst_phy;
bus_space_handle_t bsh_phy;
bus_space_tag_t bst_usbc;
bus_space_handle_t bsh_usbc;
};
static struct resource_spec vybrid_ehci_spec[] = {
{ SYS_RES_MEMORY, 0, RF_ACTIVE },
{ SYS_RES_MEMORY, 1, RF_ACTIVE },
{ SYS_RES_MEMORY, 2, RF_ACTIVE },
{ SYS_RES_IRQ, 0, RF_ACTIVE },
{ -1, 0 }
};
static device_method_t ehci_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, vybrid_ehci_probe),
DEVMETHOD(device_attach, vybrid_ehci_attach),
DEVMETHOD(device_detach, vybrid_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
vybrid_ehci_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (ofw_bus_is_compatible(dev, "fsl,mvf600-usb-ehci") == 0)
return (ENXIO);
device_set_desc(dev, "Vybrid Family integrated USB controller");
return (BUS_PROBE_DEFAULT);
}
static int
phy_init(struct vybrid_ehci_softc *esc)
{
device_t sc_gpio_dev;
int reg;
/* Reset phy */
reg = PHY_READ4(esc, USBPHY_CTRL);
reg |= (USBPHY_CTRL_SFTRST);
PHY_WRITE4(esc, USBPHY_CTRL, reg);
/* Minimum reset time */
DELAY(10000);
reg &= ~(USBPHY_CTRL_SFTRST | USBPHY_CTRL_CLKGATE);
PHY_WRITE4(esc, USBPHY_CTRL, reg);
reg = (ENUTMILEVEL2 | ENUTMILEVEL3);
PHY_WRITE4(esc, USBPHY_CTRL_SET, reg);
/* Get the GPIO device, we need this to give power to USB */
sc_gpio_dev = devclass_get_device(devclass_find("gpio"), 0);
if (sc_gpio_dev == NULL) {
device_printf(esc->dev, "Error: failed to get the GPIO dev\n");
return (1);
}
/* Give power to USB */
GPIO_PIN_SETFLAGS(sc_gpio_dev, GPIO_USB_PWR, GPIO_PIN_OUTPUT);
GPIO_PIN_SET(sc_gpio_dev, GPIO_USB_PWR, GPIO_PIN_HIGH);
/* Power up PHY */
PHY_WRITE4(esc, USBPHY_PWD, 0x00);
/* Ungate clocks */
reg = PHY_READ4(esc, USBPHY_DEBUG);
reg &= ~(USBPHY_DEBUG_CLKGATE);
PHY_WRITE4(esc, USBPHY_DEBUG, reg);
#if 0
printf("USBPHY_CTRL == 0x%08x\n",
PHY_READ4(esc, USBPHY_CTRL));
printf("USBPHY_IP == 0x%08x\n",
PHY_READ4(esc, USBPHY_IP));
printf("USBPHY_STATUS == 0x%08x\n",
PHY_READ4(esc, USBPHY_STATUS));
printf("USBPHY_DEBUG == 0x%08x\n",
PHY_READ4(esc, USBPHY_DEBUG));
printf("USBPHY_DEBUG0_STATUS == 0x%08x\n",
PHY_READ4(esc, USBPHY_DEBUG0_STATUS));
printf("USBPHY_DEBUG1 == 0x%08x\n",
PHY_READ4(esc, USBPHY_DEBUG1));
#endif
return (0);
}
static int
vybrid_ehci_attach(device_t dev)
{
struct vybrid_ehci_softc *esc;
ehci_softc_t *sc;
bus_space_handle_t bsh;
int err;
int reg;
esc = device_get_softc(dev);
esc->dev = dev;
sc = &esc->base;
sc->sc_bus.parent = dev;
sc->sc_bus.devices = sc->sc_devices;
sc->sc_bus.devices_max = EHCI_MAX_DEVICES;
sc->sc_bus.dma_bits = 32;
if (bus_alloc_resources(dev, vybrid_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]);
esc->bst_usbc = rman_get_bustag(esc->res[1]);
esc->bsh_usbc = rman_get_bushandle(esc->res[1]);
esc->bst_phy = rman_get_bustag(esc->res[2]);
esc->bsh_phy = rman_get_bushandle(esc->res[2]);
/* get all DMA memory */
if (usb_bus_mem_alloc_all(&sc->sc_bus, USB_GET_DMA_TAG(dev),
&ehci_iterate_hw_softc))
return (ENXIO);
#if 0
printf("USBx_HCSPARAMS is 0x%08x\n",
bus_space_read_4(sc->sc_io_tag, bsh, USB_HCSPARAMS));
printf("USB_ID == 0x%08x\n",
bus_space_read_4(sc->sc_io_tag, bsh, USB_ID));
printf("USB_HWGENERAL == 0x%08x\n",
bus_space_read_4(sc->sc_io_tag, bsh, USB_HWGENERAL));
printf("USB_HWHOST == 0x%08x\n",
bus_space_read_4(sc->sc_io_tag, bsh, USB_HWHOST));
printf("USB_HWDEVICE == 0x%08x\n",
bus_space_read_4(sc->sc_io_tag, bsh, USB_HWDEVICE));
printf("USB_HWTXBUF == 0x%08x\n",
bus_space_read_4(sc->sc_io_tag, bsh, USB_HWTXBUF));
printf("USB_HWRXBUF == 0x%08x\n",
bus_space_read_4(sc->sc_io_tag, bsh, USB_HWRXBUF));
#endif
if (phy_init(esc)) {
device_printf(dev, "Could not setup PHY\n");
return (1);
}
/*
* Set handle to USB related registers subregion used by
* generic EHCI driver.
*/
err = bus_space_subregion(sc->sc_io_tag, bsh, 0x100,
sc->sc_io_size, &sc->sc_io_hdl);
if (err != 0)
return (ENXIO);
/* Setup interrupt handler */
err = bus_setup_intr(dev, esc->res[3], 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, "Freescale", sizeof(sc->sc_vendor));
/* Set host mode */
reg = bus_space_read_4(sc->sc_io_tag, sc->sc_io_hdl, 0xA8);
reg |= 0x3;
bus_space_write_4(sc->sc_io_tag, sc->sc_io_hdl, 0xA8, reg);
/* Set flags */
sc->sc_flags |= EHCI_SCFLG_SETMODE | EHCI_SCFLG_NORESTERM;
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
vybrid_ehci_detach(device_t dev)
{
struct vybrid_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, vybrid_ehci_spec, esc->res);
return (0);
}
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