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freebsd-skq/sys/arm/xilinx/zy7_ehci.c
Michal Meloun cdf4ec6873 EHCI: Make core reset and port speed reading more generic. 
Use driver settable callbacks for handling of:
- core post reset
- reading actual port speed

Typically, OTG enabled EHCI cores wants setting of USBMODE register,
but this register is not defined in EHCI specification and different
cores can have it on different offset.

Also, for cores with TT extension, actual port speed must be determinable.
But again, EHCI specification not covers this so this patch provides
function for two most common variant of speed bits layout.

Reviewed by: hselasky
Differential Revision: https://reviews.freebsd.org/D5088
2016-01-28 14:11:59 +00:00

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/*-
* Copyright (c) 2012-2013 Thomas Skibo
* 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.
*
* $FreeBSD$
*/
/*
* A host-controller driver for Zynq-7000's USB OTG controller.
*
* Reference: Zynq-7000 All Programmable SoC Technical Reference Manual.
* (v1.4) November 16, 2012. Xilinx doc UG585. Ch. 15 covers the USB
* controller and register definitions are in appendix B.34.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/condvar.h>
#include <sys/resource.h>
#include <sys/rman.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <machine/stdarg.h>
#include <dev/fdt/fdt_common.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/ehci.h>
#include <dev/usb/controller/ehcireg.h>
/* Register definitions. */
#define ZY7_USB_ID 0x0000
#define ZY7_USB_HWGENERAL 0x0004
#define ZY7_USB_HWHOST 0x0008
#define ZY7_USB_HWDEVICE 0x000c
#define ZY7_USB_HWTXBUF 0x0010
#define ZY7_USB_HWRXBUF 0x0014
#define ZY7_USB_GPTIMER0LD 0x0080
#define ZY7_USB_GPTIMER0CTRL 0x0084
#define ZY7_USB_GPTIMER1LD 0x0088
#define ZY7_USB_GPTIMER1CTRL 0x008c
#define ZY7_USB_SBUSCFG 0x0090
#define ZY7_USB_CAPLENGTH_HCIVERSION 0x0100
#define ZY7_USB_HCSPARAMS 0x0104
#define ZY7_USB_HCCPARAMS 0x0108
#define ZY7_USB_DCIVERSION 0x0120
#define ZY7_USB_DCCPARAMS 0x0124
#define ZY7_USB_USBCMD 0x0140
#define ZY7_USB_USBSTS 0x0144
#define ZY7_USB_USBINTR 0x0148
#define ZY7_USB_FRINDEX 0x014c
#define ZY7_USB_PERIODICLISTBASE_DEICEADDR 0x0154
#define ZY7_USB_ASYNCLISTADDR_ENDPOINTLISTADDR 0x0158
#define ZY7_USB_TTCTRL 0x015c
#define ZY7_USB_BURSTSIZE 0x0160
#define ZY7_USB_TXFILLTUNING 0x0164
#define ZY7_USB_TXFILLTUNING_TXFIFOTHRES_SHFT 16
#define ZY7_USB_TXFILLTUNING_TXFIFOTHRES_MASK (0x3f<<16)
#define ZY7_USB_TXTFILLTUNING 0x0168
#define ZY7_USB_IC_USB 0x016c
#define ZY7_USB_ULPI_VIEWPORT 0x0170
#define ZY7_USB_ULPI_VIEWPORT_WU (1<<31)
#define ZY7_USB_ULPI_VIEWPORT_RUN (1<<30)
#define ZY7_USB_ULPI_VIEWPORT_RW (1<<29)
#define ZY7_USB_ULPI_VIEWPORT_SS (1<<27)
#define ZY7_USB_ULPI_VIEWPORT_PORT_MASK (7<<24)
#define ZY7_USB_ULPI_VIEWPORT_PORT_SHIFT 24
#define ZY7_USB_ULPI_VIEWPORT_ADDR_MASK (0xff<<16)
#define ZY7_USB_ULPI_VIEWPORT_ADDR_SHIFT 16
#define ZY7_USB_ULPI_VIEWPORT_DATARD_MASK (0xff<<8)
#define ZY7_USB_ULPI_VIEWPORT_DATARD_SHIFT 8
#define ZY7_USB_ULPI_VIEWPORT_DATAWR_MASK (0xff<<0)
#define ZY7_USB_ULPI_VIEWPORT_DATAWR_SHIFT 0
#define ZY7_USB_ENDPTNAK 0x0178
#define ZY7_USB_ENDPTNAKEN 0x017c
#define ZY7_USB_CONFIGFLAG 0x0180
#define ZY7_USB_PORTSC(n) (0x0180+4*(n))
#define ZY7_USB_PORTSC_PTS_MASK (3<<30)
#define ZY7_USB_PORTSC_PTS_SHIFT 30
#define ZY7_USB_PORTSC_PTS_UTMI (0<<30)
#define ZY7_USB_PORTSC_PTS_ULPI (2<<30)
#define ZY7_USB_PORTSC_PTS_SERIAL (3<<30)
#define ZY7_USB_PORTSC_PTW (1<<28)
#define ZY7_USB_PORTSC_PTS2 (1<<25)
#define ZY7_USB_OTGSC 0x01a4
#define ZY7_USB_USBMODE 0x01a8
#define ZY7_USB_ENDPTSETUPSTAT 0x01ac
#define ZY7_USB_ENDPTPRIME 0x01b0
#define ZY7_USB_ENDPTFLUSH 0x01b4
#define ZY7_USB_ENDPTSTAT 0x01b8
#define ZY7_USB_ENDPTCOMPLETE 0x01bc
#define ZY7_USB_ENDPTCTRL(n) (0x01c0+4*(n))
#define EHCI_REG_OFFSET ZY7_USB_CAPLENGTH_HCIVERSION
#define EHCI_REG_SIZE 0x100
static void
zy7_ehci_post_reset(struct ehci_softc *ehci_softc)
{
uint32_t usbmode;
/* Force HOST mode */
usbmode = EOREAD4(ehci_softc, EHCI_USBMODE_NOLPM);
usbmode &= ~EHCI_UM_CM;
usbmode |= EHCI_UM_CM_HOST;
EOWRITE4(ehci_softc, EHCI_USBMODE_NOLPM, usbmode);
}
static int
zy7_phy_config(device_t dev, bus_space_tag_t io_tag, bus_space_handle_t bsh)
{
phandle_t node;
char buf[64];
uint32_t portsc;
int tries;
node = ofw_bus_get_node(dev);
if (OF_getprop(node, "phy_type", buf, sizeof(buf)) > 0) {
portsc = bus_space_read_4(io_tag, bsh, ZY7_USB_PORTSC(1));
portsc &= ~(ZY7_USB_PORTSC_PTS_MASK | ZY7_USB_PORTSC_PTW |
ZY7_USB_PORTSC_PTS2);
if (strcmp(buf,"ulpi") == 0)
portsc |= ZY7_USB_PORTSC_PTS_ULPI;
else if (strcmp(buf,"utmi") == 0)
portsc |= ZY7_USB_PORTSC_PTS_UTMI;
else if (strcmp(buf,"utmi-wide") == 0)
portsc |= (ZY7_USB_PORTSC_PTS_UTMI |
ZY7_USB_PORTSC_PTW);
else if (strcmp(buf, "serial") == 0)
portsc |= ZY7_USB_PORTSC_PTS_SERIAL;
bus_space_write_4(io_tag, bsh, ZY7_USB_PORTSC(1), portsc);
}
if (OF_getprop(node, "phy_vbus_ext", buf, sizeof(buf)) >= 0) {
/* Tell PHY that VBUS is supplied externally. */
bus_space_write_4(io_tag, bsh, ZY7_USB_ULPI_VIEWPORT,
ZY7_USB_ULPI_VIEWPORT_RUN |
ZY7_USB_ULPI_VIEWPORT_RW |
(0 << ZY7_USB_ULPI_VIEWPORT_PORT_SHIFT) |
(0x0b << ZY7_USB_ULPI_VIEWPORT_ADDR_SHIFT) |
(0x60 << ZY7_USB_ULPI_VIEWPORT_DATAWR_SHIFT)
);
tries = 100;
while ((bus_space_read_4(io_tag, bsh, ZY7_USB_ULPI_VIEWPORT) &
ZY7_USB_ULPI_VIEWPORT_RUN) != 0) {
if (--tries < 0)
return (-1);
DELAY(1);
}
}
return (0);
}
static int
zy7_ehci_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (!ofw_bus_is_compatible(dev, "xlnx,zy7_ehci"))
return (ENXIO);
device_set_desc(dev, "Zynq-7000 EHCI USB 2.0 controller");
return (0);
}
static int zy7_ehci_detach(device_t dev);
static int
zy7_ehci_attach(device_t dev)
{
ehci_softc_t *sc = device_get_softc(dev);
bus_space_handle_t bsh;
int err, rid;
/* initialize some bus fields */
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;
/* get all DMA memory */
if (usb_bus_mem_alloc_all(&sc->sc_bus,
USB_GET_DMA_TAG(dev), &ehci_iterate_hw_softc))
return (ENOMEM);
/* Allocate memory. */
rid = 0;
sc->sc_io_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
&rid, RF_ACTIVE);
if (sc->sc_io_res == NULL) {
device_printf(dev, "Can't allocate memory");
zy7_ehci_detach(dev);
return (ENOMEM);
}
sc->sc_io_tag = rman_get_bustag(sc->sc_io_res);
bsh = rman_get_bushandle(sc->sc_io_res);
sc->sc_io_size = EHCI_REG_SIZE;
if (bus_space_subregion(sc->sc_io_tag, bsh, EHCI_REG_OFFSET,
sc->sc_io_size, &sc->sc_io_hdl) != 0)
panic("%s: unable to subregion USB host registers",
device_get_name(dev));
/* Allocate IRQ. */
rid = 0;
sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
RF_ACTIVE);
if (sc->sc_irq_res == NULL) {
device_printf(dev, "Can't allocate IRQ\n");
zy7_ehci_detach(dev);
return (ENOMEM);
}
/* 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");
zy7_ehci_detach(dev);
return (ENXIO);
}
device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
device_set_desc(sc->sc_bus.bdev, "Zynq-7000 ehci USB 2.0 controller");
strcpy(sc->sc_vendor, "Xilinx"); /* or IP vendor? */
/* Activate the interrupt */
err = bus_setup_intr(dev, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
NULL, (driver_intr_t *)ehci_interrupt, sc,
&sc->sc_intr_hdl);
if (err) {
device_printf(dev, "Cannot setup IRQ\n");
zy7_ehci_detach(dev);
return (err);
}
/* Customization. */
sc->sc_flags |= EHCI_SCFLG_TT | EHCI_SCFLG_NORESTERM;
sc->sc_vendor_post_reset = zy7_ehci_post_reset;
sc->sc_vendor_get_port_speed = ehci_get_port_speed_portsc;
/* Modify FIFO burst threshold from 2 to 8. */
bus_space_write_4(sc->sc_io_tag, bsh,
ZY7_USB_TXFILLTUNING,
8 << ZY7_USB_TXFILLTUNING_TXFIFOTHRES_SHFT);
/* Handle PHY options. */
if (zy7_phy_config(dev, sc->sc_io_tag, bsh) < 0) {
device_printf(dev, "Cannot config phy!\n");
zy7_ehci_detach(dev);
return (EIO);
}
/* Init ehci. */
err = ehci_init(sc);
if (!err) {
sc->sc_flags |= EHCI_SCFLG_DONEINIT;
err = device_probe_and_attach(sc->sc_bus.bdev);
}
if (err) {
device_printf(dev, "USB init failed err=%d\n", err);
zy7_ehci_detach(dev);
return (err);
}
return (0);
}
static int
zy7_ehci_detach(device_t dev)
{
ehci_softc_t *sc = device_get_softc(dev);
sc->sc_flags &= ~EHCI_SCFLG_DONEINIT;
if (device_is_attached(dev))
bus_generic_detach(dev);
if (sc->sc_irq_res && sc->sc_intr_hdl)
/* call ehci_detach() after ehci_init() called after
* successful bus_setup_intr().
*/
ehci_detach(sc);
if (sc->sc_bus.bdev) {
device_detach(sc->sc_bus.bdev);
device_delete_child(dev, sc->sc_bus.bdev);
}
if (sc->sc_irq_res) {
if (sc->sc_intr_hdl != NULL)
bus_teardown_intr(dev, sc->sc_irq_res,
sc->sc_intr_hdl);
bus_release_resource(dev, SYS_RES_IRQ,
rman_get_rid(sc->sc_irq_res), sc->sc_irq_res);
}
if (sc->sc_io_res)
bus_release_resource(dev, SYS_RES_MEMORY,
rman_get_rid(sc->sc_io_res), sc->sc_io_res);
usb_bus_mem_free_all(&sc->sc_bus, &ehci_iterate_hw_softc);
return (0);
}
static device_method_t ehci_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, zy7_ehci_probe),
DEVMETHOD(device_attach, zy7_ehci_attach),
DEVMETHOD(device_detach, zy7_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),
DEVMETHOD_END
};
static driver_t ehci_driver = {
"ehci",
ehci_methods,
sizeof(struct ehci_softc),
};
static devclass_t ehci_devclass;
DRIVER_MODULE(ehci, simplebus, ehci_driver, ehci_devclass, NULL, NULL);
MODULE_DEPEND(ehci, usb, 1, 1, 1);
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