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freebsd-dev/sys/dev/usb/controller/ehci_ixp4xx.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

328 lines
8.9 KiB
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/*-
* Copyright (c) 2008 Sam Leffler. 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 ``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 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.
*/
/*
* IXP435 attachment driver for the USB Enhanced Host Controller.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_bus.h"
#include <sys/stdint.h>
#include <sys/stddef.h>
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/condvar.h>
#include <sys/sysctl.h>
#include <sys/sx.h>
#include <sys/unistd.h>
#include <sys/callout.h>
#include <sys/malloc.h>
#include <sys/priv.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>
#include <arm/xscale/ixp425/ixp425reg.h>
#include <arm/xscale/ixp425/ixp425var.h>
#define EHCI_VENDORID_IXP4XX 0x42fa05
#define EHCI_HC_DEVSTR "IXP4XX Integrated USB 2.0 controller"
struct ixp_ehci_softc {
ehci_softc_t base; /* storage for EHCI code */
bus_space_tag_t iot;
bus_space_handle_t ioh;
struct bus_space tag; /* tag for private bus space ops */
};
static device_attach_t ehci_ixp_attach;
static device_detach_t ehci_ixp_detach;
static uint8_t ehci_bs_r_1(bus_space_tag_t tag, bus_space_handle_t, bus_size_t);
static void ehci_bs_w_1(bus_space_tag_t tag, bus_space_handle_t, bus_size_t, u_int8_t);
static uint16_t ehci_bs_r_2(bus_space_tag_t tag, bus_space_handle_t, bus_size_t);
static void ehci_bs_w_2(bus_space_tag_t tag, bus_space_handle_t, bus_size_t, uint16_t);
static uint32_t ehci_bs_r_4(bus_space_tag_t tag, bus_space_handle_t, bus_size_t);
static void ehci_bs_w_4(bus_space_tag_t tag, bus_space_handle_t, bus_size_t, uint32_t);
static void
ehci_ixp_post_reset(struct ehci_softc *ehci_softc)
{
uint32_t usbmode;
/* Force HOST mode, select big-endian mode */
usbmode = EOREAD4(ehci_softc, EHCI_USBMODE_NOLPM);
usbmode &= ~EHCI_UM_CM;
usbmode |= EHCI_UM_CM_HOST;
usbmode |= EHCI_UM_ES_BE;
EOWRITE4(ehci_softc, EHCI_USBMODE_NOLPM, usbmode);
}
static int
ehci_ixp_probe(device_t self)
{
device_set_desc(self, EHCI_HC_DEVSTR);
return (BUS_PROBE_DEFAULT);
}
static int
ehci_ixp_attach(device_t self)
{
struct ixp_ehci_softc *isc = device_get_softc(self);
ehci_softc_t *sc = &isc->base;
int err;
int rid;
/* initialise some bus fields */
sc->sc_bus.parent = self;
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(self), &ehci_iterate_hw_softc)) {
return (ENOMEM);
}
/* NB: hints fix the memory location and irq */
rid = 0;
sc->sc_io_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE);
if (!sc->sc_io_res) {
device_printf(self, "Could not map memory\n");
goto error;
}
/*
* Craft special resource for bus space ops that handle
* byte-alignment of non-word addresses. Also, since
* we're already intercepting bus space ops we handle
* the register window offset that could otherwise be
* done with bus_space_subregion.
*/
isc->iot = rman_get_bustag(sc->sc_io_res);
isc->tag.bs_privdata = isc->iot;
/* read single */
isc->tag.bs_r_1 = ehci_bs_r_1,
isc->tag.bs_r_2 = ehci_bs_r_2,
isc->tag.bs_r_4 = ehci_bs_r_4,
/* write (single) */
isc->tag.bs_w_1 = ehci_bs_w_1,
isc->tag.bs_w_2 = ehci_bs_w_2,
isc->tag.bs_w_4 = ehci_bs_w_4,
sc->sc_io_tag = &isc->tag;
sc->sc_io_hdl = rman_get_bushandle(sc->sc_io_res);
sc->sc_io_size = IXP435_USB1_SIZE - 0x100;
rid = 0;
sc->sc_irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ, &rid,
RF_ACTIVE);
if (sc->sc_irq_res == NULL) {
device_printf(self, "Could not allocate irq\n");
goto error;
}
sc->sc_bus.bdev = device_add_child(self, "usbus", -1);
if (!sc->sc_bus.bdev) {
device_printf(self, "Could not add USB device\n");
goto error;
}
device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
device_set_desc(sc->sc_bus.bdev, EHCI_HC_DEVSTR);
sprintf(sc->sc_vendor, "Intel");
err = bus_setup_intr(self, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
NULL, (driver_intr_t *)ehci_interrupt, sc, &sc->sc_intr_hdl);
if (err) {
device_printf(self, "Could not setup irq, %d\n", err);
sc->sc_intr_hdl = NULL;
goto error;
}
/*
* Select big-endian byte alignment and arrange to not terminate
* reset operations (the adapter will ignore it if we do but might
* as well save a reg write). Also, the controller has an embedded
* Transaction Translator which means port speed must be read from
* the Port Status register following a port enable.
*/
sc->sc_flags |= EHCI_SCFLG_TT
| EHCI_SCFLG_BIGEDESC
| EHCI_SCFLG_NORESTERM
;
/* Setup callbacks. */
sc->sc_vendor_post_reset = ehci_ixp_post_reset;
sc->sc_vendor_get_port_speed = ehci_get_port_speed_portsc;
err = ehci_init(sc);
if (!err) {
err = device_probe_and_attach(sc->sc_bus.bdev);
}
if (err) {
device_printf(self, "USB init failed err=%d\n", err);
goto error;
}
return (0);
error:
ehci_ixp_detach(self);
return (ENXIO);
}
static int
ehci_ixp_detach(device_t self)
{
struct ixp_ehci_softc *isc = device_get_softc(self);
ehci_softc_t *sc = &isc->base;
device_t bdev;
int err;
if (sc->sc_bus.bdev) {
bdev = sc->sc_bus.bdev;
device_detach(bdev);
device_delete_child(self, bdev);
}
/* during module unload there are lots of children leftover */
device_delete_children(self);
if (sc->sc_irq_res && sc->sc_intr_hdl) {
/*
* only call ehci_detach() after ehci_init()
*/
ehci_detach(sc);
err = bus_teardown_intr(self, sc->sc_irq_res, sc->sc_intr_hdl);
if (err)
/* XXX or should we panic? */
device_printf(self, "Could not tear down irq, %d\n",
err);
sc->sc_intr_hdl = NULL;
}
if (sc->sc_irq_res) {
bus_release_resource(self, SYS_RES_IRQ, 0, sc->sc_irq_res);
sc->sc_irq_res = NULL;
}
if (sc->sc_io_res) {
bus_release_resource(self, SYS_RES_MEMORY, 0,
sc->sc_io_res);
sc->sc_io_res = NULL;
}
usb_bus_mem_free_all(&sc->sc_bus, &ehci_iterate_hw_softc);
return (0);
}
/*
* Bus space accessors for PIO operations.
*/
static uint8_t
ehci_bs_r_1(bus_space_tag_t tag, bus_space_handle_t h, bus_size_t o)
{
return bus_space_read_1((bus_space_tag_t)tag->bs_privdata, h,
0x100 + (o &~ 3) + (3 - (o & 3)));
}
static void
ehci_bs_w_1(bus_space_tag_t tag, bus_space_handle_t h, bus_size_t o, u_int8_t v)
{
panic("%s", __func__);
}
static uint16_t
ehci_bs_r_2(bus_space_tag_t tag, bus_space_handle_t h, bus_size_t o)
{
return bus_space_read_2((bus_space_tag_t)tag->bs_privdata, h,
0x100 + (o &~ 3) + (2 - (o & 3)));
}
static void
ehci_bs_w_2(bus_space_tag_t tag, bus_space_handle_t h, bus_size_t o, uint16_t v)
{
panic("%s", __func__);
}
static uint32_t
ehci_bs_r_4(bus_space_tag_t tag, bus_space_handle_t h, bus_size_t o)
{
return bus_space_read_4((bus_space_tag_t) tag->bs_privdata, h, 0x100 + o);
}
static void
ehci_bs_w_4(bus_space_tag_t tag, bus_space_handle_t h, bus_size_t o, uint32_t v)
{
bus_space_write_4((bus_space_tag_t) tag->bs_privdata, h, 0x100 + o, v);
}
static device_method_t ehci_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, ehci_ixp_probe),
DEVMETHOD(device_attach, ehci_ixp_attach),
DEVMETHOD(device_detach, ehci_ixp_detach),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD_END
};
static driver_t ehci_driver = {
"ehci",
ehci_methods,
sizeof(struct ixp_ehci_softc),
};
static devclass_t ehci_devclass;
DRIVER_MODULE(ehci, ixp, ehci_driver, ehci_devclass, 0, 0);
MODULE_DEPEND(ehci, usb, 1, 1, 1);
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