| Current Path : /sys/dev/usb/controller/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/dev/usb/controller/usb_controller.c |
/* $FreeBSD: release/9.1.0/sys/dev/usb/controller/usb_controller.c 232870 2012-03-12 17:54:17Z hselasky $ */
/*-
* Copyright (c) 2008 Hans Petter Selasky. 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.
*/
#include "opt_ddb.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>
#define USB_DEBUG_VAR usb_ctrl_debug
#include <dev/usb/usb_core.h>
#include <dev/usb/usb_debug.h>
#include <dev/usb/usb_process.h>
#include <dev/usb/usb_busdma.h>
#include <dev/usb/usb_dynamic.h>
#include <dev/usb/usb_device.h>
#include <dev/usb/usb_hub.h>
#include <dev/usb/usb_controller.h>
#include <dev/usb/usb_bus.h>
#include <dev/usb/usb_pf.h>
#include "usb_if.h"
/* function prototypes */
static device_probe_t usb_probe;
static device_attach_t usb_attach;
static device_detach_t usb_detach;
static device_suspend_t usb_suspend;
static device_resume_t usb_resume;
static device_shutdown_t usb_shutdown;
static void usb_attach_sub(device_t, struct usb_bus *);
/* static variables */
#ifdef USB_DEBUG
static int usb_ctrl_debug = 0;
SYSCTL_NODE(_hw_usb, OID_AUTO, ctrl, CTLFLAG_RW, 0, "USB controller");
SYSCTL_INT(_hw_usb_ctrl, OID_AUTO, debug, CTLFLAG_RW, &usb_ctrl_debug, 0,
"Debug level");
#endif
static int usb_no_boot_wait = 0;
TUNABLE_INT("hw.usb.no_boot_wait", &usb_no_boot_wait);
SYSCTL_INT(_hw_usb, OID_AUTO, no_boot_wait, CTLFLAG_RDTUN, &usb_no_boot_wait, 0,
"No USB device enumerate waiting at boot.");
static int usb_no_suspend_wait = 0;
TUNABLE_INT("hw.usb.no_suspend_wait", &usb_no_suspend_wait);
SYSCTL_INT(_hw_usb, OID_AUTO, no_suspend_wait, CTLFLAG_RW|CTLFLAG_TUN,
&usb_no_suspend_wait, 0, "No USB device waiting at system suspend.");
static int usb_no_shutdown_wait = 0;
TUNABLE_INT("hw.usb.no_shutdown_wait", &usb_no_shutdown_wait);
SYSCTL_INT(_hw_usb, OID_AUTO, no_shutdown_wait, CTLFLAG_RW|CTLFLAG_TUN,
&usb_no_shutdown_wait, 0, "No USB device waiting at system shutdown.");
static devclass_t usb_devclass;
static device_method_t usb_methods[] = {
DEVMETHOD(device_probe, usb_probe),
DEVMETHOD(device_attach, usb_attach),
DEVMETHOD(device_detach, usb_detach),
DEVMETHOD(device_suspend, usb_suspend),
DEVMETHOD(device_resume, usb_resume),
DEVMETHOD(device_shutdown, usb_shutdown),
{0, 0}
};
static driver_t usb_driver = {
.name = "usbus",
.methods = usb_methods,
.size = 0,
};
/* Host Only Drivers */
DRIVER_MODULE(usbus, ohci, usb_driver, usb_devclass, 0, 0);
DRIVER_MODULE(usbus, uhci, usb_driver, usb_devclass, 0, 0);
DRIVER_MODULE(usbus, ehci, usb_driver, usb_devclass, 0, 0);
DRIVER_MODULE(usbus, xhci, usb_driver, usb_devclass, 0, 0);
/* Device Only Drivers */
DRIVER_MODULE(usbus, at91_udp, usb_driver, usb_devclass, 0, 0);
DRIVER_MODULE(usbus, musbotg, usb_driver, usb_devclass, 0, 0);
DRIVER_MODULE(usbus, uss820, usb_driver, usb_devclass, 0, 0);
/*------------------------------------------------------------------------*
* usb_probe
*
* This function is called from "{ehci,ohci,uhci}_pci_attach()".
*------------------------------------------------------------------------*/
static int
usb_probe(device_t dev)
{
DPRINTF("\n");
return (0);
}
static void
usb_root_mount_rel(struct usb_bus *bus)
{
if (bus->bus_roothold != NULL) {
DPRINTF("Releasing root mount hold %p\n", bus->bus_roothold);
root_mount_rel(bus->bus_roothold);
bus->bus_roothold = NULL;
}
}
/*------------------------------------------------------------------------*
* usb_attach
*------------------------------------------------------------------------*/
static int
usb_attach(device_t dev)
{
struct usb_bus *bus = device_get_ivars(dev);
DPRINTF("\n");
if (bus == NULL) {
device_printf(dev, "USB device has no ivars\n");
return (ENXIO);
}
if (usb_no_boot_wait == 0) {
/* delay vfs_mountroot until the bus is explored */
bus->bus_roothold = root_mount_hold(device_get_nameunit(dev));
}
usb_attach_sub(dev, bus);
return (0); /* return success */
}
/*------------------------------------------------------------------------*
* usb_detach
*------------------------------------------------------------------------*/
static int
usb_detach(device_t dev)
{
struct usb_bus *bus = device_get_softc(dev);
DPRINTF("\n");
if (bus == NULL) {
/* was never setup properly */
return (0);
}
/* Stop power watchdog */
usb_callout_drain(&bus->power_wdog);
/* Let the USB explore process detach all devices. */
usb_root_mount_rel(bus);
USB_BUS_LOCK(bus);
/* Queue detach job */
usb_proc_msignal(&bus->explore_proc,
&bus->detach_msg[0], &bus->detach_msg[1]);
/* Wait for detach to complete */
usb_proc_mwait(&bus->explore_proc,
&bus->detach_msg[0], &bus->detach_msg[1]);
USB_BUS_UNLOCK(bus);
/* Get rid of USB callback processes */
usb_proc_free(&bus->giant_callback_proc);
usb_proc_free(&bus->non_giant_callback_proc);
/* Get rid of USB explore process */
usb_proc_free(&bus->explore_proc);
/* Get rid of control transfer process */
usb_proc_free(&bus->control_xfer_proc);
#if USB_HAVE_PF
usbpf_detach(bus);
#endif
return (0);
}
/*------------------------------------------------------------------------*
* usb_suspend
*------------------------------------------------------------------------*/
static int
usb_suspend(device_t dev)
{
struct usb_bus *bus = device_get_softc(dev);
DPRINTF("\n");
if (bus == NULL) {
/* was never setup properly */
return (0);
}
USB_BUS_LOCK(bus);
usb_proc_msignal(&bus->explore_proc,
&bus->suspend_msg[0], &bus->suspend_msg[1]);
if (usb_no_suspend_wait == 0) {
/* wait for suspend callback to be executed */
usb_proc_mwait(&bus->explore_proc,
&bus->suspend_msg[0], &bus->suspend_msg[1]);
}
USB_BUS_UNLOCK(bus);
return (0);
}
/*------------------------------------------------------------------------*
* usb_resume
*------------------------------------------------------------------------*/
static int
usb_resume(device_t dev)
{
struct usb_bus *bus = device_get_softc(dev);
DPRINTF("\n");
if (bus == NULL) {
/* was never setup properly */
return (0);
}
USB_BUS_LOCK(bus);
usb_proc_msignal(&bus->explore_proc,
&bus->resume_msg[0], &bus->resume_msg[1]);
USB_BUS_UNLOCK(bus);
return (0);
}
/*------------------------------------------------------------------------*
* usb_shutdown
*------------------------------------------------------------------------*/
static int
usb_shutdown(device_t dev)
{
struct usb_bus *bus = device_get_softc(dev);
DPRINTF("\n");
if (bus == NULL) {
/* was never setup properly */
return (0);
}
device_printf(bus->bdev, "Controller shutdown\n");
USB_BUS_LOCK(bus);
usb_proc_msignal(&bus->explore_proc,
&bus->shutdown_msg[0], &bus->shutdown_msg[1]);
if (usb_no_shutdown_wait == 0) {
/* wait for shutdown callback to be executed */
usb_proc_mwait(&bus->explore_proc,
&bus->shutdown_msg[0], &bus->shutdown_msg[1]);
}
USB_BUS_UNLOCK(bus);
device_printf(bus->bdev, "Controller shutdown complete\n");
return (0);
}
/*------------------------------------------------------------------------*
* usb_bus_explore
*
* This function is used to explore the device tree from the root.
*------------------------------------------------------------------------*/
static void
usb_bus_explore(struct usb_proc_msg *pm)
{
struct usb_bus *bus;
struct usb_device *udev;
bus = ((struct usb_bus_msg *)pm)->bus;
udev = bus->devices[USB_ROOT_HUB_ADDR];
if (bus->no_explore != 0)
return;
if (udev && udev->hub) {
if (bus->do_probe) {
bus->do_probe = 0;
bus->driver_added_refcount++;
}
if (bus->driver_added_refcount == 0) {
/* avoid zero, hence that is memory default */
bus->driver_added_refcount = 1;
}
#ifdef DDB
/*
* The following three lines of code are only here to
* recover from DDB:
*/
usb_proc_rewakeup(&bus->control_xfer_proc);
usb_proc_rewakeup(&bus->giant_callback_proc);
usb_proc_rewakeup(&bus->non_giant_callback_proc);
#endif
USB_BUS_UNLOCK(bus);
#if USB_HAVE_POWERD
/*
* First update the USB power state!
*/
usb_bus_powerd(bus);
#endif
/* Explore the Root USB HUB. */
(udev->hub->explore) (udev);
USB_BUS_LOCK(bus);
}
usb_root_mount_rel(bus);
}
/*------------------------------------------------------------------------*
* usb_bus_detach
*
* This function is used to detach the device tree from the root.
*------------------------------------------------------------------------*/
static void
usb_bus_detach(struct usb_proc_msg *pm)
{
struct usb_bus *bus;
struct usb_device *udev;
device_t dev;
bus = ((struct usb_bus_msg *)pm)->bus;
udev = bus->devices[USB_ROOT_HUB_ADDR];
dev = bus->bdev;
/* clear the softc */
device_set_softc(dev, NULL);
USB_BUS_UNLOCK(bus);
/* detach children first */
mtx_lock(&Giant);
bus_generic_detach(dev);
mtx_unlock(&Giant);
/*
* Free USB device and all subdevices, if any.
*/
usb_free_device(udev, 0);
USB_BUS_LOCK(bus);
/* clear bdev variable last */
bus->bdev = NULL;
}
/*------------------------------------------------------------------------*
* usb_bus_suspend
*
* This function is used to suspend the USB contoller.
*------------------------------------------------------------------------*/
static void
usb_bus_suspend(struct usb_proc_msg *pm)
{
struct usb_bus *bus;
struct usb_device *udev;
usb_error_t err;
bus = ((struct usb_bus_msg *)pm)->bus;
udev = bus->devices[USB_ROOT_HUB_ADDR];
if (udev == NULL || bus->bdev == NULL)
return;
USB_BUS_UNLOCK(bus);
/*
* We use the shutdown event here because the suspend and
* resume events are reserved for the USB port suspend and
* resume. The USB system suspend is implemented like full
* shutdown and all connected USB devices will be disconnected
* subsequently. At resume all USB devices will be
* re-connected again.
*/
bus_generic_shutdown(bus->bdev);
usbd_enum_lock(udev);
err = usbd_set_config_index(udev, USB_UNCONFIG_INDEX);
if (err)
device_printf(bus->bdev, "Could not unconfigure root HUB\n");
USB_BUS_LOCK(bus);
bus->hw_power_state = 0;
bus->no_explore = 1;
USB_BUS_UNLOCK(bus);
if (bus->methods->set_hw_power != NULL)
(bus->methods->set_hw_power) (bus);
if (bus->methods->set_hw_power_sleep != NULL)
(bus->methods->set_hw_power_sleep) (bus, USB_HW_POWER_SUSPEND);
usbd_enum_unlock(udev);
USB_BUS_LOCK(bus);
}
/*------------------------------------------------------------------------*
* usb_bus_resume
*
* This function is used to resume the USB contoller.
*------------------------------------------------------------------------*/
static void
usb_bus_resume(struct usb_proc_msg *pm)
{
struct usb_bus *bus;
struct usb_device *udev;
usb_error_t err;
bus = ((struct usb_bus_msg *)pm)->bus;
udev = bus->devices[USB_ROOT_HUB_ADDR];
if (udev == NULL || bus->bdev == NULL)
return;
USB_BUS_UNLOCK(bus);
usbd_enum_lock(udev);
#if 0
DEVMETHOD(usb_take_controller, NULL); /* dummy */
#endif
USB_TAKE_CONTROLLER(device_get_parent(bus->bdev));
USB_BUS_LOCK(bus);
bus->hw_power_state =
USB_HW_POWER_CONTROL |
USB_HW_POWER_BULK |
USB_HW_POWER_INTERRUPT |
USB_HW_POWER_ISOC |
USB_HW_POWER_NON_ROOT_HUB;
bus->no_explore = 0;
USB_BUS_UNLOCK(bus);
if (bus->methods->set_hw_power_sleep != NULL)
(bus->methods->set_hw_power_sleep) (bus, USB_HW_POWER_RESUME);
if (bus->methods->set_hw_power != NULL)
(bus->methods->set_hw_power) (bus);
/* restore USB configuration to index 0 */
err = usbd_set_config_index(udev, 0);
if (err)
device_printf(bus->bdev, "Could not configure root HUB\n");
/* probe and attach */
err = usb_probe_and_attach(udev, USB_IFACE_INDEX_ANY);
if (err) {
device_printf(bus->bdev, "Could not probe and "
"attach root HUB\n");
}
usbd_enum_unlock(udev);
USB_BUS_LOCK(bus);
}
/*------------------------------------------------------------------------*
* usb_bus_shutdown
*
* This function is used to shutdown the USB contoller.
*------------------------------------------------------------------------*/
static void
usb_bus_shutdown(struct usb_proc_msg *pm)
{
struct usb_bus *bus;
struct usb_device *udev;
usb_error_t err;
bus = ((struct usb_bus_msg *)pm)->bus;
udev = bus->devices[USB_ROOT_HUB_ADDR];
if (udev == NULL || bus->bdev == NULL)
return;
USB_BUS_UNLOCK(bus);
bus_generic_shutdown(bus->bdev);
usbd_enum_lock(udev);
err = usbd_set_config_index(udev, USB_UNCONFIG_INDEX);
if (err)
device_printf(bus->bdev, "Could not unconfigure root HUB\n");
USB_BUS_LOCK(bus);
bus->hw_power_state = 0;
bus->no_explore = 1;
USB_BUS_UNLOCK(bus);
if (bus->methods->set_hw_power != NULL)
(bus->methods->set_hw_power) (bus);
if (bus->methods->set_hw_power_sleep != NULL)
(bus->methods->set_hw_power_sleep) (bus, USB_HW_POWER_SHUTDOWN);
usbd_enum_unlock(udev);
USB_BUS_LOCK(bus);
}
static void
usb_power_wdog(void *arg)
{
struct usb_bus *bus = arg;
USB_BUS_LOCK_ASSERT(bus, MA_OWNED);
usb_callout_reset(&bus->power_wdog,
4 * hz, usb_power_wdog, arg);
#ifdef DDB
/*
* The following line of code is only here to recover from
* DDB:
*/
usb_proc_rewakeup(&bus->explore_proc); /* recover from DDB */
#endif
#if USB_HAVE_POWERD
USB_BUS_UNLOCK(bus);
usb_bus_power_update(bus);
USB_BUS_LOCK(bus);
#endif
}
/*------------------------------------------------------------------------*
* usb_bus_attach
*
* This function attaches USB in context of the explore thread.
*------------------------------------------------------------------------*/
static void
usb_bus_attach(struct usb_proc_msg *pm)
{
struct usb_bus *bus;
struct usb_device *child;
device_t dev;
usb_error_t err;
enum usb_dev_speed speed;
bus = ((struct usb_bus_msg *)pm)->bus;
dev = bus->bdev;
DPRINTF("\n");
switch (bus->usbrev) {
case USB_REV_1_0:
speed = USB_SPEED_FULL;
device_printf(bus->bdev, "12Mbps Full Speed USB v1.0\n");
break;
case USB_REV_1_1:
speed = USB_SPEED_FULL;
device_printf(bus->bdev, "12Mbps Full Speed USB v1.1\n");
break;
case USB_REV_2_0:
speed = USB_SPEED_HIGH;
device_printf(bus->bdev, "480Mbps High Speed USB v2.0\n");
break;
case USB_REV_2_5:
speed = USB_SPEED_VARIABLE;
device_printf(bus->bdev, "480Mbps Wireless USB v2.5\n");
break;
case USB_REV_3_0:
speed = USB_SPEED_SUPER;
device_printf(bus->bdev, "5.0Gbps Super Speed USB v3.0\n");
break;
default:
device_printf(bus->bdev, "Unsupported USB revision\n");
usb_root_mount_rel(bus);
return;
}
/* default power_mask value */
bus->hw_power_state =
USB_HW_POWER_CONTROL |
USB_HW_POWER_BULK |
USB_HW_POWER_INTERRUPT |
USB_HW_POWER_ISOC |
USB_HW_POWER_NON_ROOT_HUB;
USB_BUS_UNLOCK(bus);
/* make sure power is set at least once */
if (bus->methods->set_hw_power != NULL) {
(bus->methods->set_hw_power) (bus);
}
/* allocate the Root USB device */
child = usb_alloc_device(bus->bdev, bus, NULL, 0, 0, 1,
speed, USB_MODE_HOST);
if (child) {
err = usb_probe_and_attach(child,
USB_IFACE_INDEX_ANY);
if (!err) {
if ((bus->devices[USB_ROOT_HUB_ADDR] == NULL) ||
(bus->devices[USB_ROOT_HUB_ADDR]->hub == NULL)) {
err = USB_ERR_NO_ROOT_HUB;
}
}
} else {
err = USB_ERR_NOMEM;
}
USB_BUS_LOCK(bus);
if (err) {
device_printf(bus->bdev, "Root HUB problem, error=%s\n",
usbd_errstr(err));
usb_root_mount_rel(bus);
}
/* set softc - we are ready */
device_set_softc(dev, bus);
/* start watchdog */
usb_power_wdog(bus);
}
/*------------------------------------------------------------------------*
* usb_attach_sub
*
* This function creates a thread which runs the USB attach code.
*------------------------------------------------------------------------*/
static void
usb_attach_sub(device_t dev, struct usb_bus *bus)
{
const char *pname = device_get_nameunit(dev);
mtx_lock(&Giant);
if (usb_devclass_ptr == NULL)
usb_devclass_ptr = devclass_find("usbus");
mtx_unlock(&Giant);
#if USB_HAVE_PF
usbpf_attach(bus);
#endif
/* Initialise USB process messages */
bus->explore_msg[0].hdr.pm_callback = &usb_bus_explore;
bus->explore_msg[0].bus = bus;
bus->explore_msg[1].hdr.pm_callback = &usb_bus_explore;
bus->explore_msg[1].bus = bus;
bus->detach_msg[0].hdr.pm_callback = &usb_bus_detach;
bus->detach_msg[0].bus = bus;
bus->detach_msg[1].hdr.pm_callback = &usb_bus_detach;
bus->detach_msg[1].bus = bus;
bus->attach_msg[0].hdr.pm_callback = &usb_bus_attach;
bus->attach_msg[0].bus = bus;
bus->attach_msg[1].hdr.pm_callback = &usb_bus_attach;
bus->attach_msg[1].bus = bus;
bus->suspend_msg[0].hdr.pm_callback = &usb_bus_suspend;
bus->suspend_msg[0].bus = bus;
bus->suspend_msg[1].hdr.pm_callback = &usb_bus_suspend;
bus->suspend_msg[1].bus = bus;
bus->resume_msg[0].hdr.pm_callback = &usb_bus_resume;
bus->resume_msg[0].bus = bus;
bus->resume_msg[1].hdr.pm_callback = &usb_bus_resume;
bus->resume_msg[1].bus = bus;
bus->shutdown_msg[0].hdr.pm_callback = &usb_bus_shutdown;
bus->shutdown_msg[0].bus = bus;
bus->shutdown_msg[1].hdr.pm_callback = &usb_bus_shutdown;
bus->shutdown_msg[1].bus = bus;
/* Create USB explore and callback processes */
if (usb_proc_create(&bus->giant_callback_proc,
&bus->bus_mtx, pname, USB_PRI_MED)) {
device_printf(dev, "WARNING: Creation of USB Giant "
"callback process failed.\n");
} else if (usb_proc_create(&bus->non_giant_callback_proc,
&bus->bus_mtx, pname, USB_PRI_HIGH)) {
device_printf(dev, "WARNING: Creation of USB non-Giant "
"callback process failed.\n");
} else if (usb_proc_create(&bus->explore_proc,
&bus->bus_mtx, pname, USB_PRI_MED)) {
device_printf(dev, "WARNING: Creation of USB explore "
"process failed.\n");
} else if (usb_proc_create(&bus->control_xfer_proc,
&bus->bus_mtx, pname, USB_PRI_MED)) {
device_printf(dev, "WARNING: Creation of USB control transfer "
"process failed.\n");
} else {
/* Get final attach going */
USB_BUS_LOCK(bus);
usb_proc_msignal(&bus->explore_proc,
&bus->attach_msg[0], &bus->attach_msg[1]);
USB_BUS_UNLOCK(bus);
/* Do initial explore */
usb_needs_explore(bus, 1);
}
}
SYSUNINIT(usb_bus_unload, SI_SUB_KLD, SI_ORDER_ANY, usb_bus_unload, NULL);
/*------------------------------------------------------------------------*
* usb_bus_mem_flush_all_cb
*------------------------------------------------------------------------*/
#if USB_HAVE_BUSDMA
static void
usb_bus_mem_flush_all_cb(struct usb_bus *bus, struct usb_page_cache *pc,
struct usb_page *pg, usb_size_t size, usb_size_t align)
{
usb_pc_cpu_flush(pc);
}
#endif
/*------------------------------------------------------------------------*
* usb_bus_mem_flush_all - factored out code
*------------------------------------------------------------------------*/
#if USB_HAVE_BUSDMA
void
usb_bus_mem_flush_all(struct usb_bus *bus, usb_bus_mem_cb_t *cb)
{
if (cb) {
cb(bus, &usb_bus_mem_flush_all_cb);
}
}
#endif
/*------------------------------------------------------------------------*
* usb_bus_mem_alloc_all_cb
*------------------------------------------------------------------------*/
#if USB_HAVE_BUSDMA
static void
usb_bus_mem_alloc_all_cb(struct usb_bus *bus, struct usb_page_cache *pc,
struct usb_page *pg, usb_size_t size, usb_size_t align)
{
/* need to initialize the page cache */
pc->tag_parent = bus->dma_parent_tag;
if (usb_pc_alloc_mem(pc, pg, size, align)) {
bus->alloc_failed = 1;
}
}
#endif
/*------------------------------------------------------------------------*
* usb_bus_mem_alloc_all - factored out code
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
uint8_t
usb_bus_mem_alloc_all(struct usb_bus *bus, bus_dma_tag_t dmat,
usb_bus_mem_cb_t *cb)
{
bus->alloc_failed = 0;
mtx_init(&bus->bus_mtx, device_get_nameunit(bus->parent),
NULL, MTX_DEF | MTX_RECURSE);
usb_callout_init_mtx(&bus->power_wdog,
&bus->bus_mtx, 0);
TAILQ_INIT(&bus->intr_q.head);
#if USB_HAVE_BUSDMA
usb_dma_tag_setup(bus->dma_parent_tag, bus->dma_tags,
dmat, &bus->bus_mtx, NULL, 32, USB_BUS_DMA_TAG_MAX);
#endif
if ((bus->devices_max > USB_MAX_DEVICES) ||
(bus->devices_max < USB_MIN_DEVICES) ||
(bus->devices == NULL)) {
DPRINTFN(0, "Devices field has not been "
"initialised properly\n");
bus->alloc_failed = 1; /* failure */
}
#if USB_HAVE_BUSDMA
if (cb) {
cb(bus, &usb_bus_mem_alloc_all_cb);
}
#endif
if (bus->alloc_failed) {
usb_bus_mem_free_all(bus, cb);
}
return (bus->alloc_failed);
}
/*------------------------------------------------------------------------*
* usb_bus_mem_free_all_cb
*------------------------------------------------------------------------*/
#if USB_HAVE_BUSDMA
static void
usb_bus_mem_free_all_cb(struct usb_bus *bus, struct usb_page_cache *pc,
struct usb_page *pg, usb_size_t size, usb_size_t align)
{
usb_pc_free_mem(pc);
}
#endif
/*------------------------------------------------------------------------*
* usb_bus_mem_free_all - factored out code
*------------------------------------------------------------------------*/
void
usb_bus_mem_free_all(struct usb_bus *bus, usb_bus_mem_cb_t *cb)
{
#if USB_HAVE_BUSDMA
if (cb) {
cb(bus, &usb_bus_mem_free_all_cb);
}
usb_dma_tag_unsetup(bus->dma_parent_tag);
#endif
mtx_destroy(&bus->bus_mtx);
}