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freebsd-skq/sys/dev/usb/usb_generic.c
Hans Petter Selasky 0eb8d46232 Improve USB polling mode by not locking any mutexes, asserting any 
mutexes or using any callouts when active.

Trying to lock a mutex when KDB is active or the scheduler is stopped
can result in infinite wait loops. The same goes for calling callout
related functions which in turn lock mutexes.

If the USB controller at which a USB keyboard is connected is idle
when KDB is entered, polling the USB keyboard via USB will always
succeed. Else polling may fail depending on which state the USB
subsystem and USB interrupt handler is in. This is unavoidable unless
KDB can wait for USB interrupt threads to complete before stalling the
CPU(s).

Tested by:	Bruce Evans <bde@freebsd.org>
MFC after:	4 weeks
2016-09-14 12:07:34 +00:00

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/* $FreeBSD$ */
/*-
* 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.
*/
#ifdef USB_GLOBAL_INCLUDE_FILE
#include USB_GLOBAL_INCLUDE_FILE
#else
#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 <sys/conf.h>
#include <sys/fcntl.h>
#include <dev/usb/usb.h>
#include <dev/usb/usb_ioctl.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#define USB_DEBUG_VAR ugen_debug
#include <dev/usb/usb_core.h>
#include <dev/usb/usb_dev.h>
#include <dev/usb/usb_mbuf.h>
#include <dev/usb/usb_process.h>
#include <dev/usb/usb_device.h>
#include <dev/usb/usb_debug.h>
#include <dev/usb/usb_request.h>
#include <dev/usb/usb_busdma.h>
#include <dev/usb/usb_util.h>
#include <dev/usb/usb_hub.h>
#include <dev/usb/usb_generic.h>
#include <dev/usb/usb_transfer.h>
#include <dev/usb/usb_controller.h>
#include <dev/usb/usb_bus.h>
#endif /* USB_GLOBAL_INCLUDE_FILE */
#if USB_HAVE_UGEN
/* defines */
#define UGEN_BULK_FS_BUFFER_SIZE (64*32) /* bytes */
#define UGEN_BULK_HS_BUFFER_SIZE (1024*32) /* bytes */
#define UGEN_HW_FRAMES 50 /* number of milliseconds per transfer */
/* function prototypes */
static usb_callback_t ugen_read_clear_stall_callback;
static usb_callback_t ugen_write_clear_stall_callback;
static usb_callback_t ugen_ctrl_read_callback;
static usb_callback_t ugen_ctrl_write_callback;
static usb_callback_t ugen_isoc_read_callback;
static usb_callback_t ugen_isoc_write_callback;
static usb_callback_t ugen_ctrl_fs_callback;
static usb_fifo_open_t ugen_open;
static usb_fifo_close_t ugen_close;
static usb_fifo_ioctl_t ugen_ioctl;
static usb_fifo_ioctl_t ugen_ioctl_post;
static usb_fifo_cmd_t ugen_start_read;
static usb_fifo_cmd_t ugen_start_write;
static usb_fifo_cmd_t ugen_stop_io;
static int ugen_transfer_setup(struct usb_fifo *,
const struct usb_config *, uint8_t);
static int ugen_open_pipe_write(struct usb_fifo *);
static int ugen_open_pipe_read(struct usb_fifo *);
static int ugen_set_config(struct usb_fifo *, uint8_t);
static int ugen_set_interface(struct usb_fifo *, uint8_t, uint8_t);
static int ugen_get_cdesc(struct usb_fifo *, struct usb_gen_descriptor *);
static int ugen_get_sdesc(struct usb_fifo *, struct usb_gen_descriptor *);
static int ugen_get_iface_driver(struct usb_fifo *f, struct usb_gen_descriptor *ugd);
static int usb_gen_fill_deviceinfo(struct usb_fifo *,
struct usb_device_info *);
static int ugen_re_enumerate(struct usb_fifo *);
static int ugen_iface_ioctl(struct usb_fifo *, u_long, void *, int);
static uint8_t ugen_fs_get_complete(struct usb_fifo *, uint8_t *);
static int ugen_fs_uninit(struct usb_fifo *f);
/* structures */
struct usb_fifo_methods usb_ugen_methods = {
.f_open = &ugen_open,
.f_close = &ugen_close,
.f_ioctl = &ugen_ioctl,
.f_ioctl_post = &ugen_ioctl_post,
.f_start_read = &ugen_start_read,
.f_stop_read = &ugen_stop_io,
.f_start_write = &ugen_start_write,
.f_stop_write = &ugen_stop_io,
};
#ifdef USB_DEBUG
static int ugen_debug = 0;
static SYSCTL_NODE(_hw_usb, OID_AUTO, ugen, CTLFLAG_RW, 0, "USB generic");
SYSCTL_INT(_hw_usb_ugen, OID_AUTO, debug, CTLFLAG_RWTUN, &ugen_debug,
0, "Debug level");
#endif
/* prototypes */
static int
ugen_transfer_setup(struct usb_fifo *f,
const struct usb_config *setup, uint8_t n_setup)
{
struct usb_endpoint *ep = usb_fifo_softc(f);
struct usb_device *udev = f->udev;
uint8_t iface_index = ep->iface_index;
int error;
mtx_unlock(f->priv_mtx);
/*
* "usbd_transfer_setup()" can sleep so one needs to make a wrapper,
* exiting the mutex and checking things
*/
error = usbd_transfer_setup(udev, &iface_index, f->xfer,
setup, n_setup, f, f->priv_mtx);
if (error == 0) {
if (f->xfer[0]->nframes == 1) {
error = usb_fifo_alloc_buffer(f,
f->xfer[0]->max_data_length, 2);
} else {
error = usb_fifo_alloc_buffer(f,
f->xfer[0]->max_frame_size,
2 * f->xfer[0]->nframes);
}
if (error) {
usbd_transfer_unsetup(f->xfer, n_setup);
}
}
mtx_lock(f->priv_mtx);
return (error);
}
static int
ugen_open(struct usb_fifo *f, int fflags)
{
struct usb_endpoint *ep = usb_fifo_softc(f);
struct usb_endpoint_descriptor *ed = ep->edesc;
uint8_t type;
DPRINTFN(6, "flag=0x%x\n", fflags);
mtx_lock(f->priv_mtx);
switch (usbd_get_speed(f->udev)) {
case USB_SPEED_LOW:
case USB_SPEED_FULL:
f->nframes = UGEN_HW_FRAMES;
f->bufsize = UGEN_BULK_FS_BUFFER_SIZE;
break;
default:
f->nframes = UGEN_HW_FRAMES * 8;
f->bufsize = UGEN_BULK_HS_BUFFER_SIZE;
break;
}
type = ed->bmAttributes & UE_XFERTYPE;
if (type == UE_INTERRUPT) {
f->bufsize = 0; /* use "wMaxPacketSize" */
}
f->timeout = USB_NO_TIMEOUT;
f->flag_short = 0;
f->fifo_zlp = 0;
mtx_unlock(f->priv_mtx);
return (0);
}
static void
ugen_close(struct usb_fifo *f, int fflags)
{
DPRINTFN(6, "flag=0x%x\n", fflags);
/* cleanup */
mtx_lock(f->priv_mtx);
usbd_transfer_stop(f->xfer[0]);
usbd_transfer_stop(f->xfer[1]);
mtx_unlock(f->priv_mtx);
usbd_transfer_unsetup(f->xfer, 2);
usb_fifo_free_buffer(f);
if (ugen_fs_uninit(f)) {
/* ignore any errors - we are closing */
DPRINTFN(6, "no FIFOs\n");
}
}
static int
ugen_open_pipe_write(struct usb_fifo *f)
{
struct usb_config usb_config[2];
struct usb_endpoint *ep = usb_fifo_softc(f);
struct usb_endpoint_descriptor *ed = ep->edesc;
USB_MTX_ASSERT(f->priv_mtx, MA_OWNED);
if (f->xfer[0] || f->xfer[1]) {
/* transfers are already opened */
return (0);
}
memset(usb_config, 0, sizeof(usb_config));
usb_config[1].type = UE_CONTROL;
usb_config[1].endpoint = 0;
usb_config[1].direction = UE_DIR_ANY;
usb_config[1].timeout = 1000; /* 1 second */
usb_config[1].interval = 50;/* 50 milliseconds */
usb_config[1].bufsize = sizeof(struct usb_device_request);
usb_config[1].callback = &ugen_write_clear_stall_callback;
usb_config[1].usb_mode = USB_MODE_HOST;
usb_config[0].type = ed->bmAttributes & UE_XFERTYPE;
usb_config[0].endpoint = ed->bEndpointAddress & UE_ADDR;
usb_config[0].stream_id = 0; /* XXX support more stream ID's */
usb_config[0].direction = UE_DIR_TX;
usb_config[0].interval = USB_DEFAULT_INTERVAL;
usb_config[0].flags.proxy_buffer = 1;
usb_config[0].usb_mode = USB_MODE_DUAL; /* both modes */
switch (ed->bmAttributes & UE_XFERTYPE) {
case UE_INTERRUPT:
case UE_BULK:
if (f->flag_short) {
usb_config[0].flags.force_short_xfer = 1;
}
usb_config[0].callback = &ugen_ctrl_write_callback;
usb_config[0].timeout = f->timeout;
usb_config[0].frames = 1;
usb_config[0].bufsize = f->bufsize;
if (ugen_transfer_setup(f, usb_config, 2)) {
return (EIO);
}
/* first transfer does not clear stall */
f->flag_stall = 0;
break;
case UE_ISOCHRONOUS:
usb_config[0].flags.short_xfer_ok = 1;
usb_config[0].bufsize = 0; /* use default */
usb_config[0].frames = f->nframes;
usb_config[0].callback = &ugen_isoc_write_callback;
usb_config[0].timeout = 0;
/* clone configuration */
usb_config[1] = usb_config[0];
if (ugen_transfer_setup(f, usb_config, 2)) {
return (EIO);
}
break;
default:
return (EINVAL);
}
return (0);
}
static int
ugen_open_pipe_read(struct usb_fifo *f)
{
struct usb_config usb_config[2];
struct usb_endpoint *ep = usb_fifo_softc(f);
struct usb_endpoint_descriptor *ed = ep->edesc;
USB_MTX_ASSERT(f->priv_mtx, MA_OWNED);
if (f->xfer[0] || f->xfer[1]) {
/* transfers are already opened */
return (0);
}
memset(usb_config, 0, sizeof(usb_config));
usb_config[1].type = UE_CONTROL;
usb_config[1].endpoint = 0;
usb_config[1].direction = UE_DIR_ANY;
usb_config[1].timeout = 1000; /* 1 second */
usb_config[1].interval = 50;/* 50 milliseconds */
usb_config[1].bufsize = sizeof(struct usb_device_request);
usb_config[1].callback = &ugen_read_clear_stall_callback;
usb_config[1].usb_mode = USB_MODE_HOST;
usb_config[0].type = ed->bmAttributes & UE_XFERTYPE;
usb_config[0].endpoint = ed->bEndpointAddress & UE_ADDR;
usb_config[0].stream_id = 0; /* XXX support more stream ID's */
usb_config[0].direction = UE_DIR_RX;
usb_config[0].interval = USB_DEFAULT_INTERVAL;
usb_config[0].flags.proxy_buffer = 1;
usb_config[0].usb_mode = USB_MODE_DUAL; /* both modes */
switch (ed->bmAttributes & UE_XFERTYPE) {
case UE_INTERRUPT:
case UE_BULK:
if (f->flag_short) {
usb_config[0].flags.short_xfer_ok = 1;
}
usb_config[0].timeout = f->timeout;
usb_config[0].frames = 1;
usb_config[0].callback = &ugen_ctrl_read_callback;
usb_config[0].bufsize = f->bufsize;
if (ugen_transfer_setup(f, usb_config, 2)) {
return (EIO);
}
/* first transfer does not clear stall */
f->flag_stall = 0;
break;
case UE_ISOCHRONOUS:
usb_config[0].flags.short_xfer_ok = 1;
usb_config[0].bufsize = 0; /* use default */
usb_config[0].frames = f->nframes;
usb_config[0].callback = &ugen_isoc_read_callback;
usb_config[0].timeout = 0;
/* clone configuration */
usb_config[1] = usb_config[0];
if (ugen_transfer_setup(f, usb_config, 2)) {
return (EIO);
}
break;
default:
return (EINVAL);
}
return (0);
}
static void
ugen_start_read(struct usb_fifo *f)
{
/* check that pipes are open */
if (ugen_open_pipe_read(f)) {
/* signal error */
usb_fifo_put_data_error(f);
}
/* start transfers */
usbd_transfer_start(f->xfer[0]);
usbd_transfer_start(f->xfer[1]);
}
static void
ugen_start_write(struct usb_fifo *f)
{
/* check that pipes are open */
if (ugen_open_pipe_write(f)) {
/* signal error */
usb_fifo_get_data_error(f);
}
/* start transfers */
usbd_transfer_start(f->xfer[0]);
usbd_transfer_start(f->xfer[1]);
}
static void
ugen_stop_io(struct usb_fifo *f)
{
/* stop transfers */
usbd_transfer_stop(f->xfer[0]);
usbd_transfer_stop(f->xfer[1]);
}
static void
ugen_ctrl_read_callback(struct usb_xfer *xfer, usb_error_t error)
{
struct usb_fifo *f = usbd_xfer_softc(xfer);
struct usb_mbuf *m;
DPRINTFN(4, "actlen=%u, aframes=%u\n", xfer->actlen, xfer->aframes);
switch (USB_GET_STATE(xfer)) {
case USB_ST_TRANSFERRED:
if (xfer->actlen == 0) {
if (f->fifo_zlp != 4) {
f->fifo_zlp++;
} else {
/*
* Throttle a little bit we have multiple ZLPs
* in a row!
*/
xfer->interval = 64; /* ms */
}
} else {
/* clear throttle */
xfer->interval = 0;
f->fifo_zlp = 0;
}
usb_fifo_put_data(f, xfer->frbuffers, 0,
xfer->actlen, 1);
case USB_ST_SETUP:
if (f->flag_stall) {
usbd_transfer_start(f->xfer[1]);
break;
}
USB_IF_POLL(&f->free_q, m);
if (m) {
usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
usbd_transfer_submit(xfer);
}
break;
default: /* Error */
if (xfer->error != USB_ERR_CANCELLED) {
/* send a zero length packet to userland */
usb_fifo_put_data(f, xfer->frbuffers, 0, 0, 1);
f->flag_stall = 1;
f->fifo_zlp = 0;
usbd_transfer_start(f->xfer[1]);
}
break;
}
}
static void
ugen_ctrl_write_callback(struct usb_xfer *xfer, usb_error_t error)
{
struct usb_fifo *f = usbd_xfer_softc(xfer);
usb_frlength_t actlen;
DPRINTFN(4, "actlen=%u, aframes=%u\n", xfer->actlen, xfer->aframes);
switch (USB_GET_STATE(xfer)) {
case USB_ST_SETUP:
case USB_ST_TRANSFERRED:
/*
* If writing is in stall, just jump to clear stall
* callback and solve the situation.
*/
if (f->flag_stall) {
usbd_transfer_start(f->xfer[1]);
break;
}
/*
* Write data, setup and perform hardware transfer.
*/
if (usb_fifo_get_data(f, xfer->frbuffers, 0,
xfer->max_data_length, &actlen, 0)) {
usbd_xfer_set_frame_len(xfer, 0, actlen);
usbd_transfer_submit(xfer);
}
break;
default: /* Error */
if (xfer->error != USB_ERR_CANCELLED) {
f->flag_stall = 1;
usbd_transfer_start(f->xfer[1]);
}
break;
}
}
static void
ugen_read_clear_stall_callback(struct usb_xfer *xfer, usb_error_t error)
{
struct usb_fifo *f = usbd_xfer_softc(xfer);
struct usb_xfer *xfer_other = f->xfer[0];
if (f->flag_stall == 0) {
/* nothing to do */
return;
}
if (usbd_clear_stall_callback(xfer, xfer_other)) {
DPRINTFN(5, "f=%p: stall cleared\n", f);
f->flag_stall = 0;
usbd_transfer_start(xfer_other);
}
}
static void
ugen_write_clear_stall_callback(struct usb_xfer *xfer, usb_error_t error)
{
struct usb_fifo *f = usbd_xfer_softc(xfer);
struct usb_xfer *xfer_other = f->xfer[0];
if (f->flag_stall == 0) {
/* nothing to do */
return;
}
if (usbd_clear_stall_callback(xfer, xfer_other)) {
DPRINTFN(5, "f=%p: stall cleared\n", f);
f->flag_stall = 0;
usbd_transfer_start(xfer_other);
}
}
static void
ugen_isoc_read_callback(struct usb_xfer *xfer, usb_error_t error)
{
struct usb_fifo *f = usbd_xfer_softc(xfer);
usb_frlength_t offset;
usb_frcount_t n;
DPRINTFN(4, "actlen=%u, aframes=%u\n", xfer->actlen, xfer->aframes);
switch (USB_GET_STATE(xfer)) {
case USB_ST_TRANSFERRED:
DPRINTFN(6, "actlen=%d\n", xfer->actlen);
offset = 0;
for (n = 0; n != xfer->aframes; n++) {
usb_fifo_put_data(f, xfer->frbuffers, offset,
xfer->frlengths[n], 1);
offset += xfer->max_frame_size;
}
case USB_ST_SETUP:
tr_setup:
for (n = 0; n != xfer->nframes; n++) {
/* setup size for next transfer */
usbd_xfer_set_frame_len(xfer, n, xfer->max_frame_size);
}
usbd_transfer_submit(xfer);
break;
default: /* Error */
if (xfer->error == USB_ERR_CANCELLED) {
break;
}
goto tr_setup;
}
}
static void
ugen_isoc_write_callback(struct usb_xfer *xfer, usb_error_t error)
{
struct usb_fifo *f = usbd_xfer_softc(xfer);
usb_frlength_t actlen;
usb_frlength_t offset;
usb_frcount_t n;
DPRINTFN(4, "actlen=%u, aframes=%u\n", xfer->actlen, xfer->aframes);
switch (USB_GET_STATE(xfer)) {
case USB_ST_TRANSFERRED:
case USB_ST_SETUP:
tr_setup:
offset = 0;
for (n = 0; n != xfer->nframes; n++) {
if (usb_fifo_get_data(f, xfer->frbuffers, offset,
xfer->max_frame_size, &actlen, 1)) {
usbd_xfer_set_frame_len(xfer, n, actlen);
offset += actlen;
} else {
break;
}
}
for (; n != xfer->nframes; n++) {
/* fill in zero frames */
usbd_xfer_set_frame_len(xfer, n, 0);
}
usbd_transfer_submit(xfer);
break;
default: /* Error */
if (xfer->error == USB_ERR_CANCELLED) {
break;
}
goto tr_setup;
}
}
static int
ugen_set_config(struct usb_fifo *f, uint8_t index)
{
DPRINTFN(2, "index %u\n", index);
if (f->udev->flags.usb_mode != USB_MODE_HOST) {
/* not possible in device side mode */
return (ENOTTY);
}
/* make sure all FIFO's are gone */
/* else there can be a deadlock */
if (ugen_fs_uninit(f)) {
/* ignore any errors */
DPRINTFN(6, "no FIFOs\n");
}
if (usbd_start_set_config(f->udev, index) != 0)
return (EIO);
return (0);
}
static int
ugen_set_interface(struct usb_fifo *f,
uint8_t iface_index, uint8_t alt_index)
{
DPRINTFN(2, "%u, %u\n", iface_index, alt_index);
if (f->udev->flags.usb_mode != USB_MODE_HOST) {
/* not possible in device side mode */
return (ENOTTY);
}
/* make sure all FIFO's are gone */
/* else there can be a deadlock */
if (ugen_fs_uninit(f)) {
/* ignore any errors */
DPRINTFN(6, "no FIFOs\n");
}
/* change setting - will free generic FIFOs, if any */
if (usbd_set_alt_interface_index(f->udev, iface_index, alt_index)) {
return (EIO);
}
/* probe and attach */
if (usb_probe_and_attach(f->udev, iface_index)) {
return (EIO);
}
return (0);
}
/*------------------------------------------------------------------------*
* ugen_get_cdesc
*
* This function will retrieve the complete configuration descriptor
* at the given index.
*------------------------------------------------------------------------*/
static int
ugen_get_cdesc(struct usb_fifo *f, struct usb_gen_descriptor *ugd)
{
struct usb_config_descriptor *cdesc;
struct usb_device *udev = f->udev;
int error;
uint16_t len;
uint8_t free_data;
DPRINTFN(6, "\n");
if (ugd->ugd_data == NULL) {
/* userland pointer should not be zero */
return (EINVAL);
}
if ((ugd->ugd_config_index == USB_UNCONFIG_INDEX) ||
(ugd->ugd_config_index == udev->curr_config_index)) {
cdesc = usbd_get_config_descriptor(udev);
if (cdesc == NULL)
return (ENXIO);
free_data = 0;
} else {
#if (USB_HAVE_FIXED_CONFIG == 0)
if (usbd_req_get_config_desc_full(udev,
NULL, &cdesc, ugd->ugd_config_index)) {
return (ENXIO);
}
free_data = 1;
#else
/* configuration descriptor data is shared */
return (EINVAL);
#endif
}
len = UGETW(cdesc->wTotalLength);
if (len > ugd->ugd_maxlen) {
len = ugd->ugd_maxlen;
}
DPRINTFN(6, "len=%u\n", len);
ugd->ugd_actlen = len;
ugd->ugd_offset = 0;
error = copyout(cdesc, ugd->ugd_data, len);
if (free_data)
usbd_free_config_desc(udev, cdesc);
return (error);
}
static int
ugen_get_sdesc(struct usb_fifo *f, struct usb_gen_descriptor *ugd)
{
void *ptr;
uint16_t size;
int error;
uint8_t do_unlock;
/* Protect scratch area */
do_unlock = usbd_ctrl_lock(f->udev);
ptr = f->udev->scratch.data;
size = sizeof(f->udev->scratch.data);
if (usbd_req_get_string_desc(f->udev, NULL, ptr,
size, ugd->ugd_lang_id, ugd->ugd_string_index)) {
error = EINVAL;
} else {
if (size > ((uint8_t *)ptr)[0]) {
size = ((uint8_t *)ptr)[0];
}
if (size > ugd->ugd_maxlen) {
size = ugd->ugd_maxlen;
}
ugd->ugd_actlen = size;
ugd->ugd_offset = 0;
error = copyout(ptr, ugd->ugd_data, size);
}
if (do_unlock)
usbd_ctrl_unlock(f->udev);
return (error);
}
/*------------------------------------------------------------------------*
* ugen_get_iface_driver
*
* This function generates an USB interface description for userland.
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
static int
ugen_get_iface_driver(struct usb_fifo *f, struct usb_gen_descriptor *ugd)
{
struct usb_device *udev = f->udev;
struct usb_interface *iface;
const char *ptr;
const char *desc;
unsigned int len;
unsigned int maxlen;
char buf[128];
int error;
DPRINTFN(6, "\n");
if ((ugd->ugd_data == NULL) || (ugd->ugd_maxlen == 0)) {
/* userland pointer should not be zero */
return (EINVAL);
}
iface = usbd_get_iface(udev, ugd->ugd_iface_index);
if ((iface == NULL) || (iface->idesc == NULL)) {
/* invalid interface index */
return (EINVAL);
}
/* read out device nameunit string, if any */
if ((iface->subdev != NULL) &&
device_is_attached(iface->subdev) &&
(ptr = device_get_nameunit(iface->subdev)) &&
(desc = device_get_desc(iface->subdev))) {
/* print description */
snprintf(buf, sizeof(buf), "%s: <%s>", ptr, desc);
/* range checks */
maxlen = ugd->ugd_maxlen - 1;
len = strlen(buf);
if (len > maxlen)
len = maxlen;
/* update actual length, including terminating zero */
ugd->ugd_actlen = len + 1;
/* copy out interface description */
error = copyout(buf, ugd->ugd_data, ugd->ugd_actlen);
} else {
/* zero length string is default */
error = copyout("", ugd->ugd_data, 1);
}
return (error);
}
/*------------------------------------------------------------------------*
* usb_gen_fill_deviceinfo
*
* This function dumps information about an USB device to the
* structure pointed to by the "di" argument.
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
static int
usb_gen_fill_deviceinfo(struct usb_fifo *f, struct usb_device_info *di)
{
struct usb_device *udev;
struct usb_device *hub;
udev = f->udev;
bzero(di, sizeof(di[0]));
di->udi_bus = device_get_unit(udev->bus->bdev);
di->udi_addr = udev->address;
di->udi_index = udev->device_index;
strlcpy(di->udi_serial, usb_get_serial(udev), sizeof(di->udi_serial));
strlcpy(di->udi_vendor, usb_get_manufacturer(udev), sizeof(di->udi_vendor));
strlcpy(di->udi_product, usb_get_product(udev), sizeof(di->udi_product));
usb_printbcd(di->udi_release, sizeof(di->udi_release),
UGETW(udev->ddesc.bcdDevice));
di->udi_vendorNo = UGETW(udev->ddesc.idVendor);
di->udi_productNo = UGETW(udev->ddesc.idProduct);
di->udi_releaseNo = UGETW(udev->ddesc.bcdDevice);
di->udi_class = udev->ddesc.bDeviceClass;
di->udi_subclass = udev->ddesc.bDeviceSubClass;
di->udi_protocol = udev->ddesc.bDeviceProtocol;
di->udi_config_no = udev->curr_config_no;
di->udi_config_index = udev->curr_config_index;
di->udi_power = udev->flags.self_powered ? 0 : udev->power;
di->udi_speed = udev->speed;
di->udi_mode = udev->flags.usb_mode;
di->udi_power_mode = udev->power_mode;
di->udi_suspended = udev->flags.peer_suspended;
hub = udev->parent_hub;
if (hub) {
di->udi_hubaddr = hub->address;
di->udi_hubindex = hub->device_index;
di->udi_hubport = udev->port_no;
}
return (0);
}
/*------------------------------------------------------------------------*
* ugen_check_request
*
* Return values:
* 0: Access allowed
* Else: No access
*------------------------------------------------------------------------*/
static int
ugen_check_request(struct usb_device *udev, struct usb_device_request *req)
{
struct usb_endpoint *ep;
int error;
/*
* Avoid requests that would damage the bus integrity:
*/
if (((req->bmRequestType == UT_WRITE_DEVICE) &&
(req->bRequest == UR_SET_ADDRESS)) ||
((req->bmRequestType == UT_WRITE_DEVICE) &&
(req->bRequest == UR_SET_CONFIG)) ||
((req->bmRequestType == UT_WRITE_INTERFACE) &&
(req->bRequest == UR_SET_INTERFACE))) {
/*
* These requests can be useful for testing USB drivers.
*/
error = priv_check(curthread, PRIV_DRIVER);
if (error) {
return (error);
}
}
/*
* Special case - handle clearing of stall
*/
if (req->bmRequestType == UT_WRITE_ENDPOINT) {
ep = usbd_get_ep_by_addr(udev, req->wIndex[0]);
if (ep == NULL) {
return (EINVAL);
}
if ((req->bRequest == UR_CLEAR_FEATURE) &&
(UGETW(req->wValue) == UF_ENDPOINT_HALT)) {
usbd_clear_data_toggle(udev, ep);
}
}
/* TODO: add more checks to verify the interface index */
return (0);
}
int
ugen_do_request(struct usb_fifo *f, struct usb_ctl_request *ur)
{
int error;
uint16_t len;
uint16_t actlen;
if (ugen_check_request(f->udev, &ur->ucr_request)) {
return (EPERM);
}
len = UGETW(ur->ucr_request.wLength);
/* check if "ucr_data" is valid */
if (len != 0) {
if (ur->ucr_data == NULL) {
return (EFAULT);
}
}
/* do the USB request */
error = usbd_do_request_flags
(f->udev, NULL, &ur->ucr_request, ur->ucr_data,
(ur->ucr_flags & USB_SHORT_XFER_OK) |
USB_USER_DATA_PTR, &actlen,
USB_DEFAULT_TIMEOUT);
ur->ucr_actlen = actlen;
if (error) {
error = EIO;
}
return (error);
}
/*------------------------------------------------------------------------
* ugen_re_enumerate
*------------------------------------------------------------------------*/
static int
ugen_re_enumerate(struct usb_fifo *f)
{
struct usb_device *udev = f->udev;
int error;
/*
* This request can be useful for testing USB drivers:
*/
error = priv_check(curthread, PRIV_DRIVER);
if (error) {
return (error);
}
if (udev->flags.usb_mode != USB_MODE_HOST) {
/* not possible in device side mode */
DPRINTFN(6, "device mode\n");
return (ENOTTY);
}
/* make sure all FIFO's are gone */
/* else there can be a deadlock */
if (ugen_fs_uninit(f)) {
/* ignore any errors */
DPRINTFN(6, "no FIFOs\n");
}
/* start re-enumeration of device */
usbd_start_re_enumerate(udev);
return (0);
}
int
ugen_fs_uninit(struct usb_fifo *f)
{
if (f->fs_xfer == NULL) {
return (EINVAL);
}
usbd_transfer_unsetup(f->fs_xfer, f->fs_ep_max);
free(f->fs_xfer, M_USB);
f->fs_xfer = NULL;
f->fs_ep_max = 0;
f->fs_ep_ptr = NULL;
f->flag_iscomplete = 0;
usb_fifo_free_buffer(f);
return (0);
}
static uint8_t
ugen_fs_get_complete(struct usb_fifo *f, uint8_t *pindex)
{
struct usb_mbuf *m;
USB_IF_DEQUEUE(&f->used_q, m);
if (m) {
*pindex = *((uint8_t *)(m->cur_data_ptr));
USB_IF_ENQUEUE(&f->free_q, m);
return (0); /* success */
} else {
*pindex = 0; /* fix compiler warning */
f->flag_iscomplete = 0;
}
return (1); /* failure */
}
static void
ugen_fs_set_complete(struct usb_fifo *f, uint8_t index)
{
struct usb_mbuf *m;
USB_IF_DEQUEUE(&f->free_q, m);
if (m == NULL) {
/* can happen during close */
DPRINTF("out of buffers\n");
return;
}
USB_MBUF_RESET(m);
*((uint8_t *)(m->cur_data_ptr)) = index;
USB_IF_ENQUEUE(&f->used_q, m);
f->flag_iscomplete = 1;
usb_fifo_wakeup(f);
}
static int
ugen_fs_copy_in(struct usb_fifo *f, uint8_t ep_index)
{
struct usb_device_request *req;
struct usb_xfer *xfer;
struct usb_fs_endpoint fs_ep;
void *uaddr; /* userland pointer */
void *kaddr;
usb_frlength_t offset;
usb_frlength_t rem;
usb_frcount_t n;
uint32_t length;
int error;
uint8_t isread;
if (ep_index >= f->fs_ep_max) {
return (EINVAL);
}
xfer = f->fs_xfer[ep_index];
if (xfer == NULL) {
return (EINVAL);
}
mtx_lock(f->priv_mtx);
if (usbd_transfer_pending(xfer)) {
mtx_unlock(f->priv_mtx);
return (EBUSY); /* should not happen */
}
mtx_unlock(f->priv_mtx);
error = copyin(f->fs_ep_ptr +
ep_index, &fs_ep, sizeof(fs_ep));
if (error) {
return (error);
}
/* security checks */
if (fs_ep.nFrames > xfer->max_frame_count) {
xfer->error = USB_ERR_INVAL;
goto complete;
}
if (fs_ep.nFrames == 0) {
xfer->error = USB_ERR_INVAL;
goto complete;
}
error = copyin(fs_ep.ppBuffer,
&uaddr, sizeof(uaddr));
if (error) {
return (error);
}
/* reset first frame */
usbd_xfer_set_frame_offset(xfer, 0, 0);
if (xfer->flags_int.control_xfr) {
req = xfer->frbuffers[0].buffer;
error = copyin(fs_ep.pLength,
&length, sizeof(length));
if (error) {
return (error);
}
if (length != sizeof(*req)) {
xfer->error = USB_ERR_INVAL;
goto complete;
}
if (length != 0) {
error = copyin(uaddr, req, length);
if (error) {
return (error);
}
}
if (ugen_check_request(f->udev, req)) {
xfer->error = USB_ERR_INVAL;
goto complete;
}
usbd_xfer_set_frame_len(xfer, 0, length);
/* Host mode only ! */
if ((req->bmRequestType &
(UT_READ | UT_WRITE)) == UT_READ) {
isread = 1;
} else {
isread = 0;
}
n = 1;
offset = sizeof(*req);
} else {
/* Device and Host mode */
if (USB_GET_DATA_ISREAD(xfer)) {
isread = 1;
} else {
isread = 0;
}
n = 0;
offset = 0;
}
rem = usbd_xfer_max_len(xfer);
xfer->nframes = fs_ep.nFrames;
xfer->timeout = fs_ep.timeout;
if (xfer->timeout > 65535) {
xfer->timeout = 65535;
}
if (fs_ep.flags & USB_FS_FLAG_SINGLE_SHORT_OK)
xfer->flags.short_xfer_ok = 1;
else
xfer->flags.short_xfer_ok = 0;
if (fs_ep.flags & USB_FS_FLAG_MULTI_SHORT_OK)
xfer->flags.short_frames_ok = 1;
else
xfer->flags.short_frames_ok = 0;
if (fs_ep.flags & USB_FS_FLAG_FORCE_SHORT)
xfer->flags.force_short_xfer = 1;
else
xfer->flags.force_short_xfer = 0;
if (fs_ep.flags & USB_FS_FLAG_CLEAR_STALL)
usbd_xfer_set_stall(xfer);
else
xfer->flags.stall_pipe = 0;
for (; n != xfer->nframes; n++) {
error = copyin(fs_ep.pLength + n,
&length, sizeof(length));
if (error) {
break;
}
usbd_xfer_set_frame_len(xfer, n, length);
if (length > rem) {
xfer->error = USB_ERR_INVAL;
goto complete;
}
rem -= length;
if (!isread) {
/* we need to know the source buffer */
error = copyin(fs_ep.ppBuffer + n,
&uaddr, sizeof(uaddr));
if (error) {
break;
}
if (xfer->flags_int.isochronous_xfr) {
/* get kernel buffer address */
kaddr = xfer->frbuffers[0].buffer;
kaddr = USB_ADD_BYTES(kaddr, offset);
} else {
/* set current frame offset */
usbd_xfer_set_frame_offset(xfer, offset, n);
/* get kernel buffer address */
kaddr = xfer->frbuffers[n].buffer;
}
/* move data */
error = copyin(uaddr, kaddr, length);
if (error) {
break;
}
}
offset += length;
}
return (error);
complete:
mtx_lock(f->priv_mtx);
ugen_fs_set_complete(f, ep_index);
mtx_unlock(f->priv_mtx);
return (0);
}
static int
ugen_fs_copy_out(struct usb_fifo *f, uint8_t ep_index)
{
struct usb_device_request *req;
struct usb_xfer *xfer;
struct usb_fs_endpoint fs_ep;
struct usb_fs_endpoint *fs_ep_uptr; /* userland ptr */
void *uaddr; /* userland ptr */
void *kaddr;
usb_frlength_t offset;
usb_frlength_t rem;
usb_frcount_t n;
uint32_t length;
uint32_t temp;
int error;
uint8_t isread;
if (ep_index >= f->fs_ep_max)
return (EINVAL);
xfer = f->fs_xfer[ep_index];
if (xfer == NULL)
return (EINVAL);
mtx_lock(f->priv_mtx);
if (usbd_transfer_pending(xfer)) {
mtx_unlock(f->priv_mtx);
return (EBUSY); /* should not happen */
}
mtx_unlock(f->priv_mtx);
fs_ep_uptr = f->fs_ep_ptr + ep_index;
error = copyin(fs_ep_uptr, &fs_ep, sizeof(fs_ep));
if (error) {
return (error);
}
fs_ep.status = xfer->error;
fs_ep.aFrames = xfer->aframes;
fs_ep.isoc_time_complete = xfer->isoc_time_complete;
if (xfer->error) {
goto complete;
}
if (xfer->flags_int.control_xfr) {
req = xfer->frbuffers[0].buffer;
/* Host mode only ! */
if ((req->bmRequestType & (UT_READ | UT_WRITE)) == UT_READ) {
isread = 1;
} else {
isread = 0;
}
if (xfer->nframes == 0)
n = 0; /* should never happen */
else
n = 1;
} else {
/* Device and Host mode */
if (USB_GET_DATA_ISREAD(xfer)) {
isread = 1;
} else {
isread = 0;
}
n = 0;
}
/* Update lengths and copy out data */
rem = usbd_xfer_max_len(xfer);
offset = 0;
for (; n != xfer->nframes; n++) {
/* get initial length into "temp" */
error = copyin(fs_ep.pLength + n,
&temp, sizeof(temp));
if (error) {
return (error);
}
if (temp > rem) {
/* the userland length has been corrupted */
DPRINTF("corrupt userland length "
"%u > %u\n", temp, rem);
fs_ep.status = USB_ERR_INVAL;
goto complete;
}
rem -= temp;
/* get actual transfer length */
length = xfer->frlengths[n];
if (length > temp) {
/* data overflow */
fs_ep.status = USB_ERR_INVAL;
DPRINTF("data overflow %u > %u\n",
length, temp);
goto complete;
}
if (isread) {
/* we need to know the destination buffer */
error = copyin(fs_ep.ppBuffer + n,
&uaddr, sizeof(uaddr));
if (error) {
return (error);
}
if (xfer->flags_int.isochronous_xfr) {
/* only one frame buffer */
kaddr = USB_ADD_BYTES(
xfer->frbuffers[0].buffer, offset);
} else {
/* multiple frame buffers */
kaddr = xfer->frbuffers[n].buffer;
}
/* move data */
error = copyout(kaddr, uaddr, length);
if (error) {
return (error);
}
}
/*
* Update offset according to initial length, which is
* needed by isochronous transfers!
*/
offset += temp;
/* update length */
error = copyout(&length,
fs_ep.pLength + n, sizeof(length));
if (error) {
return (error);
}
}
complete:
/* update "aFrames" */
error = copyout(&fs_ep.aFrames, &fs_ep_uptr->aFrames,
sizeof(fs_ep.aFrames));
if (error)
goto done;
/* update "isoc_time_complete" */
error = copyout(&fs_ep.isoc_time_complete,
&fs_ep_uptr->isoc_time_complete,
sizeof(fs_ep.isoc_time_complete));
if (error)
goto done;
/* update "status" */
error = copyout(&fs_ep.status, &fs_ep_uptr->status,
sizeof(fs_ep.status));
done:
return (error);
}
static uint8_t
ugen_fifo_in_use(struct usb_fifo *f, int fflags)
{
struct usb_fifo *f_rx;
struct usb_fifo *f_tx;
f_rx = f->udev->fifo[(f->fifo_index & ~1) + USB_FIFO_RX];
f_tx = f->udev->fifo[(f->fifo_index & ~1) + USB_FIFO_TX];
if ((fflags & FREAD) && f_rx &&
(f_rx->xfer[0] || f_rx->xfer[1])) {
return (1); /* RX FIFO in use */
}
if ((fflags & FWRITE) && f_tx &&
(f_tx->xfer[0] || f_tx->xfer[1])) {
return (1); /* TX FIFO in use */
}
return (0); /* not in use */
}
static int
ugen_ioctl(struct usb_fifo *f, u_long cmd, void *addr, int fflags)
{
struct usb_config usb_config[1];
struct usb_device_request req;
union {
struct usb_fs_complete *pcomp;
struct usb_fs_start *pstart;
struct usb_fs_stop *pstop;
struct usb_fs_open *popen;
struct usb_fs_open_stream *popen_stream;
struct usb_fs_close *pclose;
struct usb_fs_clear_stall_sync *pstall;
void *addr;
} u;
struct usb_endpoint *ep;
struct usb_endpoint_descriptor *ed;
struct usb_xfer *xfer;
int error = 0;
uint8_t iface_index;
uint8_t isread;
uint8_t ep_index;
uint8_t pre_scale;
u.addr = addr;
DPRINTFN(6, "cmd=0x%08lx\n", cmd);
switch (cmd) {
case USB_FS_COMPLETE:
mtx_lock(f->priv_mtx);
error = ugen_fs_get_complete(f, &ep_index);
mtx_unlock(f->priv_mtx);
if (error) {
error = EBUSY;
break;
}
u.pcomp->ep_index = ep_index;
error = ugen_fs_copy_out(f, u.pcomp->ep_index);
break;
case USB_FS_START:
error = ugen_fs_copy_in(f, u.pstart->ep_index);
if (error)
break;
mtx_lock(f->priv_mtx);
xfer = f->fs_xfer[u.pstart->ep_index];
usbd_transfer_start(xfer);
mtx_unlock(f->priv_mtx);
break;
case USB_FS_STOP:
if (u.pstop->ep_index >= f->fs_ep_max) {
error = EINVAL;
break;
}
mtx_lock(f->priv_mtx);
xfer = f->fs_xfer[u.pstart->ep_index];
if (usbd_transfer_pending(xfer)) {
usbd_transfer_stop(xfer);
/*
* Check if the USB transfer was stopped
* before it was even started. Else a cancel
* callback will be pending.
*/
if (!xfer->flags_int.transferring) {
ugen_fs_set_complete(xfer->priv_sc,
USB_P2U(xfer->priv_fifo));
}
}
mtx_unlock(f->priv_mtx);
break;
case USB_FS_OPEN:
case USB_FS_OPEN_STREAM:
if (u.popen->ep_index >= f->fs_ep_max) {
error = EINVAL;
break;
}
if (f->fs_xfer[u.popen->ep_index] != NULL) {
error = EBUSY;
break;
}
if (u.popen->max_bufsize > USB_FS_MAX_BUFSIZE) {
u.popen->max_bufsize = USB_FS_MAX_BUFSIZE;
}
if (u.popen->max_frames & USB_FS_MAX_FRAMES_PRE_SCALE) {
pre_scale = 1;
u.popen->max_frames &= ~USB_FS_MAX_FRAMES_PRE_SCALE;
} else {
pre_scale = 0;
}
if (u.popen->max_frames > USB_FS_MAX_FRAMES) {
u.popen->max_frames = USB_FS_MAX_FRAMES;
break;
}
if (u.popen->max_frames == 0) {
error = EINVAL;
break;
}
ep = usbd_get_ep_by_addr(f->udev, u.popen->ep_no);
if (ep == NULL) {
error = EINVAL;
break;
}
ed = ep->edesc;
if (ed == NULL) {
error = ENXIO;
break;
}
iface_index = ep->iface_index;
memset(usb_config, 0, sizeof(usb_config));
usb_config[0].type = ed->bmAttributes & UE_XFERTYPE;
usb_config[0].endpoint = ed->bEndpointAddress & UE_ADDR;
usb_config[0].direction = ed->bEndpointAddress & (UE_DIR_OUT | UE_DIR_IN);
usb_config[0].interval = USB_DEFAULT_INTERVAL;
usb_config[0].flags.proxy_buffer = 1;
if (pre_scale != 0)
usb_config[0].flags.pre_scale_frames = 1;
usb_config[0].callback = &ugen_ctrl_fs_callback;
usb_config[0].timeout = 0; /* no timeout */
usb_config[0].frames = u.popen->max_frames;
usb_config[0].bufsize = u.popen->max_bufsize;
usb_config[0].usb_mode = USB_MODE_DUAL; /* both modes */
if (cmd == USB_FS_OPEN_STREAM)
usb_config[0].stream_id = u.popen_stream->stream_id;
if (usb_config[0].type == UE_CONTROL) {
if (f->udev->flags.usb_mode != USB_MODE_HOST) {
error = EINVAL;
break;
}
} else {
isread = ((usb_config[0].endpoint &
(UE_DIR_IN | UE_DIR_OUT)) == UE_DIR_IN);
if (f->udev->flags.usb_mode != USB_MODE_HOST) {
isread = !isread;
}
/* check permissions */
if (isread) {
if (!(fflags & FREAD)) {
error = EPERM;
break;
}
} else {
if (!(fflags & FWRITE)) {
error = EPERM;
break;
}
}
}
error = usbd_transfer_setup(f->udev, &iface_index,
f->fs_xfer + u.popen->ep_index, usb_config, 1,
f, f->priv_mtx);
if (error == 0) {
/* update maximums */
u.popen->max_packet_length =
f->fs_xfer[u.popen->ep_index]->max_frame_size;
u.popen->max_bufsize =
f->fs_xfer[u.popen->ep_index]->max_data_length;
/* update number of frames */
u.popen->max_frames =
f->fs_xfer[u.popen->ep_index]->nframes;
/* store index of endpoint */
f->fs_xfer[u.popen->ep_index]->priv_fifo =
((uint8_t *)0) + u.popen->ep_index;
} else {
error = ENOMEM;
}
break;
case USB_FS_CLOSE:
if (u.pclose->ep_index >= f->fs_ep_max) {
error = EINVAL;
break;
}
if (f->fs_xfer[u.pclose->ep_index] == NULL) {
error = EINVAL;
break;
}
usbd_transfer_unsetup(f->fs_xfer + u.pclose->ep_index, 1);
break;
case USB_FS_CLEAR_STALL_SYNC:
if (u.pstall->ep_index >= f->fs_ep_max) {
error = EINVAL;
break;
}
if (f->fs_xfer[u.pstall->ep_index] == NULL) {
error = EINVAL;
break;
}
if (f->udev->flags.usb_mode != USB_MODE_HOST) {
error = EINVAL;
break;
}
mtx_lock(f->priv_mtx);
error = usbd_transfer_pending(f->fs_xfer[u.pstall->ep_index]);
mtx_unlock(f->priv_mtx);
if (error) {
return (EBUSY);
}
ep = f->fs_xfer[u.pstall->ep_index]->endpoint;
/* setup a clear-stall packet */
req.bmRequestType = UT_WRITE_ENDPOINT;
req.bRequest = UR_CLEAR_FEATURE;
USETW(req.wValue, UF_ENDPOINT_HALT);
req.wIndex[0] = ep->edesc->bEndpointAddress;
req.wIndex[1] = 0;
USETW(req.wLength, 0);
error = usbd_do_request(f->udev, NULL, &req, NULL);
if (error == 0) {
usbd_clear_data_toggle(f->udev, ep);
} else {
error = ENXIO;
}
break;
default:
error = ENOIOCTL;
break;
}
DPRINTFN(6, "error=%d\n", error);
return (error);
}
static int
ugen_set_short_xfer(struct usb_fifo *f, void *addr)
{
uint8_t t;
if (*(int *)addr)
t = 1;
else
t = 0;
if (f->flag_short == t) {
/* same value like before - accept */
return (0);
}
if (f->xfer[0] || f->xfer[1]) {
/* cannot change this during transfer */
return (EBUSY);
}
f->flag_short = t;
return (0);
}
static int
ugen_set_timeout(struct usb_fifo *f, void *addr)
{
f->timeout = *(int *)addr;
if (f->timeout > 65535) {
/* limit user input */
f->timeout = 65535;
}
return (0);
}
static int
ugen_get_frame_size(struct usb_fifo *f, void *addr)
{
if (f->xfer[0]) {
*(int *)addr = f->xfer[0]->max_frame_size;
} else {
return (EINVAL);
}
return (0);
}
static int
ugen_set_buffer_size(struct usb_fifo *f, void *addr)
{
usb_frlength_t t;
if (*(int *)addr < 0)
t = 0; /* use "wMaxPacketSize" */
else if (*(int *)addr < (256 * 1024))
t = *(int *)addr;
else
t = 256 * 1024;
if (f->bufsize == t) {
/* same value like before - accept */
return (0);
}
if (f->xfer[0] || f->xfer[1]) {
/* cannot change this during transfer */
return (EBUSY);
}
f->bufsize = t;
return (0);
}
static int
ugen_get_buffer_size(struct usb_fifo *f, void *addr)
{
*(int *)addr = f->bufsize;
return (0);
}
static int
ugen_get_iface_desc(struct usb_fifo *f,
struct usb_interface_descriptor *idesc)
{
struct usb_interface *iface;
iface = usbd_get_iface(f->udev, f->iface_index);
if (iface && iface->idesc) {
*idesc = *(iface->idesc);
} else {
return (EIO);
}
return (0);
}
static int
ugen_get_endpoint_desc(struct usb_fifo *f,
struct usb_endpoint_descriptor *ed)
{
struct usb_endpoint *ep;
ep = usb_fifo_softc(f);
if (ep && ep->edesc) {
*ed = *ep->edesc;
} else {
return (EINVAL);
}
return (0);
}
static int
ugen_set_power_mode(struct usb_fifo *f, int mode)
{
struct usb_device *udev = f->udev;
int err;
uint8_t old_mode;
if ((udev == NULL) ||
(udev->parent_hub == NULL)) {
return (EINVAL);
}
err = priv_check(curthread, PRIV_DRIVER);
if (err)
return (err);
/* get old power mode */
old_mode = udev->power_mode;
/* if no change, then just return */
if (old_mode == mode)
return (0);
switch (mode) {
case USB_POWER_MODE_OFF:
if (udev->flags.usb_mode == USB_MODE_HOST &&
udev->re_enumerate_wait == USB_RE_ENUM_DONE) {
udev->re_enumerate_wait = USB_RE_ENUM_PWR_OFF;
}
/* set power mode will wake up the explore thread */
break;
case USB_POWER_MODE_ON:
case USB_POWER_MODE_SAVE:
break;
case USB_POWER_MODE_RESUME:
#if USB_HAVE_POWERD
/* let USB-powerd handle resume */
USB_BUS_LOCK(udev->bus);
udev->pwr_save.write_refs++;
udev->pwr_save.last_xfer_time = ticks;
USB_BUS_UNLOCK(udev->bus);
/* set new power mode */
usbd_set_power_mode(udev, USB_POWER_MODE_SAVE);
/* wait for resume to complete */
usb_pause_mtx(NULL, hz / 4);
/* clear write reference */
USB_BUS_LOCK(udev->bus);
udev->pwr_save.write_refs--;
USB_BUS_UNLOCK(udev->bus);
#endif
mode = USB_POWER_MODE_SAVE;
break;
case USB_POWER_MODE_SUSPEND:
#if USB_HAVE_POWERD
/* let USB-powerd handle suspend */
USB_BUS_LOCK(udev->bus);
udev->pwr_save.last_xfer_time = ticks - (256 * hz);
USB_BUS_UNLOCK(udev->bus);
#endif
mode = USB_POWER_MODE_SAVE;
break;
default:
return (EINVAL);
}
if (err)
return (ENXIO); /* I/O failure */
/* if we are powered off we need to re-enumerate first */
if (old_mode == USB_POWER_MODE_OFF) {
if (udev->flags.usb_mode == USB_MODE_HOST &&
udev->re_enumerate_wait == USB_RE_ENUM_DONE) {
udev->re_enumerate_wait = USB_RE_ENUM_START;
}
/* set power mode will wake up the explore thread */
}
/* set new power mode */
usbd_set_power_mode(udev, mode);
return (0); /* success */
}
static int
ugen_get_power_mode(struct usb_fifo *f)
{
struct usb_device *udev = f->udev;
if (udev == NULL)
return (USB_POWER_MODE_ON);
return (udev->power_mode);
}
static int
ugen_get_port_path(struct usb_fifo *f, struct usb_device_port_path *dpp)
{
struct usb_device *udev = f->udev;
struct usb_device *next;
unsigned int nlevel = 0;
if (udev == NULL)
goto error;
dpp->udp_bus = device_get_unit(udev->bus->bdev);
dpp->udp_index = udev->device_index;
/* count port levels */
next = udev;
while (next->parent_hub != NULL) {
nlevel++;
next = next->parent_hub;
}
/* check if too many levels */
if (nlevel > USB_DEVICE_PORT_PATH_MAX)
goto error;
/* store total level of ports */
dpp->udp_port_level = nlevel;
/* store port index array */
next = udev;
while (next->parent_hub != NULL) {
dpp->udp_port_no[--nlevel] = next->port_no;
next = next->parent_hub;
}
return (0); /* success */
error:
return (EINVAL); /* failure */
}
static int
ugen_get_power_usage(struct usb_fifo *f)
{
struct usb_device *udev = f->udev;
if (udev == NULL)
return (0);
return (udev->power);
}
static int
ugen_do_port_feature(struct usb_fifo *f, uint8_t port_no,
uint8_t set, uint16_t feature)
{
struct usb_device *udev = f->udev;
struct usb_hub *hub;
int err;
err = priv_check(curthread, PRIV_DRIVER);
if (err) {
return (err);
}
if (port_no == 0) {
return (EINVAL);
}
if ((udev == NULL) ||
(udev->hub == NULL)) {
return (EINVAL);
}
hub = udev->hub;
if (port_no > hub->nports) {
return (EINVAL);
}
if (set)
err = usbd_req_set_port_feature(udev,
NULL, port_no, feature);
else
err = usbd_req_clear_port_feature(udev,
NULL, port_no, feature);
if (err)
return (ENXIO); /* failure */
return (0); /* success */
}
static int
ugen_iface_ioctl(struct usb_fifo *f, u_long cmd, void *addr, int fflags)
{
struct usb_fifo *f_rx;
struct usb_fifo *f_tx;
int error = 0;
f_rx = f->udev->fifo[(f->fifo_index & ~1) + USB_FIFO_RX];
f_tx = f->udev->fifo[(f->fifo_index & ~1) + USB_FIFO_TX];
switch (cmd) {
case USB_SET_RX_SHORT_XFER:
if (fflags & FREAD) {
error = ugen_set_short_xfer(f_rx, addr);
} else {
error = EINVAL;
}
break;
case USB_SET_TX_FORCE_SHORT:
if (fflags & FWRITE) {
error = ugen_set_short_xfer(f_tx, addr);
} else {
error = EINVAL;
}
break;
case USB_SET_RX_TIMEOUT:
if (fflags & FREAD) {
error = ugen_set_timeout(f_rx, addr);
} else {
error = EINVAL;
}
break;
case USB_SET_TX_TIMEOUT:
if (fflags & FWRITE) {
error = ugen_set_timeout(f_tx, addr);
} else {
error = EINVAL;
}
break;
case USB_GET_RX_FRAME_SIZE:
if (fflags & FREAD) {
error = ugen_get_frame_size(f_rx, addr);
} else {
error = EINVAL;
}
break;
case USB_GET_TX_FRAME_SIZE:
if (fflags & FWRITE) {
error = ugen_get_frame_size(f_tx, addr);
} else {
error = EINVAL;
}
break;
case USB_SET_RX_BUFFER_SIZE:
if (fflags & FREAD) {
error = ugen_set_buffer_size(f_rx, addr);
} else {
error = EINVAL;
}
break;
case USB_SET_TX_BUFFER_SIZE:
if (fflags & FWRITE) {
error = ugen_set_buffer_size(f_tx, addr);
} else {
error = EINVAL;
}
break;
case USB_GET_RX_BUFFER_SIZE:
if (fflags & FREAD) {
error = ugen_get_buffer_size(f_rx, addr);
} else {
error = EINVAL;
}
break;
case USB_GET_TX_BUFFER_SIZE:
if (fflags & FWRITE) {
error = ugen_get_buffer_size(f_tx, addr);
} else {
error = EINVAL;
}
break;
case USB_GET_RX_INTERFACE_DESC:
if (fflags & FREAD) {
error = ugen_get_iface_desc(f_rx, addr);
} else {
error = EINVAL;
}
break;
case USB_GET_TX_INTERFACE_DESC:
if (fflags & FWRITE) {
error = ugen_get_iface_desc(f_tx, addr);
} else {
error = EINVAL;
}
break;
case USB_GET_RX_ENDPOINT_DESC:
if (fflags & FREAD) {
error = ugen_get_endpoint_desc(f_rx, addr);
} else {
error = EINVAL;
}
break;
case USB_GET_TX_ENDPOINT_DESC:
if (fflags & FWRITE) {
error = ugen_get_endpoint_desc(f_tx, addr);
} else {
error = EINVAL;
}
break;
case USB_SET_RX_STALL_FLAG:
if ((fflags & FREAD) && (*(int *)addr)) {
f_rx->flag_stall = 1;
}
break;
case USB_SET_TX_STALL_FLAG:
if ((fflags & FWRITE) && (*(int *)addr)) {
f_tx->flag_stall = 1;
}
break;
default:
error = ENOIOCTL;
break;
}
return (error);
}
static int
ugen_ioctl_post(struct usb_fifo *f, u_long cmd, void *addr, int fflags)
{
union {
struct usb_interface_descriptor *idesc;
struct usb_alt_interface *ai;
struct usb_device_descriptor *ddesc;
struct usb_config_descriptor *cdesc;
struct usb_device_stats *stat;
struct usb_fs_init *pinit;
struct usb_fs_uninit *puninit;
struct usb_device_port_path *dpp;
uint32_t *ptime;
void *addr;
int *pint;
} u;
struct usb_device_descriptor *dtemp;
struct usb_config_descriptor *ctemp;
struct usb_interface *iface;
int error = 0;
uint8_t n;
u.addr = addr;
DPRINTFN(6, "cmd=0x%08lx\n", cmd);
switch (cmd) {
case USB_DISCOVER:
usb_needs_explore_all();
break;
case USB_SETDEBUG:
if (!(fflags & FWRITE)) {
error = EPERM;
break;
}
usb_debug = *(int *)addr;
break;
case USB_GET_CONFIG:
*(int *)addr = f->udev->curr_config_index;
break;
case USB_SET_CONFIG:
if (!(fflags & FWRITE)) {
error = EPERM;
break;
}
error = ugen_set_config(f, *(int *)addr);
break;
case USB_GET_ALTINTERFACE:
iface = usbd_get_iface(f->udev,
u.ai->uai_interface_index);
if (iface && iface->idesc) {
u.ai->uai_alt_index = iface->alt_index;
} else {
error = EINVAL;
}
break;
case USB_SET_ALTINTERFACE:
if (!(fflags & FWRITE)) {
error = EPERM;
break;
}
error = ugen_set_interface(f,
u.ai->uai_interface_index, u.ai->uai_alt_index);
break;
case USB_GET_DEVICE_DESC:
dtemp = usbd_get_device_descriptor(f->udev);
if (!dtemp) {
error = EIO;
break;
}
*u.ddesc = *dtemp;
break;
case USB_GET_CONFIG_DESC:
ctemp = usbd_get_config_descriptor(f->udev);
if (!ctemp) {
error = EIO;
break;
}
*u.cdesc = *ctemp;
break;
case USB_GET_FULL_DESC:
error = ugen_get_cdesc(f, addr);
break;
case USB_GET_STRING_DESC:
error = ugen_get_sdesc(f, addr);
break;
case USB_GET_IFACE_DRIVER:
error = ugen_get_iface_driver(f, addr);
break;
case USB_REQUEST:
case USB_DO_REQUEST:
if (!(fflags & FWRITE)) {
error = EPERM;
break;
}
error = ugen_do_request(f, addr);
break;
case USB_DEVICEINFO:
case USB_GET_DEVICEINFO:
error = usb_gen_fill_deviceinfo(f, addr);
break;
case USB_DEVICESTATS:
for (n = 0; n != 4; n++) {
u.stat->uds_requests_fail[n] =
f->udev->bus->stats_err.uds_requests[n];
u.stat->uds_requests_ok[n] =
f->udev->bus->stats_ok.uds_requests[n];
}
break;
case USB_DEVICEENUMERATE:
error = ugen_re_enumerate(f);
break;
case USB_GET_PLUGTIME:
*u.ptime = f->udev->plugtime;
break;
case USB_CLAIM_INTERFACE:
case USB_RELEASE_INTERFACE:
/* TODO */
break;
case USB_IFACE_DRIVER_ACTIVE:
n = *u.pint & 0xFF;
iface = usbd_get_iface(f->udev, n);
if (iface && iface->subdev)
error = 0;
else
error = ENXIO;
break;
case USB_IFACE_DRIVER_DETACH:
error = priv_check(curthread, PRIV_DRIVER);
if (error)
break;
n = *u.pint & 0xFF;
if (n == USB_IFACE_INDEX_ANY) {
error = EINVAL;
break;
}
/*
* Detach the currently attached driver.
*/
usb_detach_device(f->udev, n, 0);
/*
* Set parent to self, this should keep attach away
* until the next set configuration event.
*/
usbd_set_parent_iface(f->udev, n, n);
break;
case USB_SET_POWER_MODE:
error = ugen_set_power_mode(f, *u.pint);
break;
case USB_GET_POWER_MODE:
*u.pint = ugen_get_power_mode(f);
break;
case USB_GET_DEV_PORT_PATH:
error = ugen_get_port_path(f, u.dpp);
break;
case USB_GET_POWER_USAGE:
*u.pint = ugen_get_power_usage(f);
break;
case USB_SET_PORT_ENABLE:
error = ugen_do_port_feature(f,
*u.pint, 1, UHF_PORT_ENABLE);
break;
case USB_SET_PORT_DISABLE:
error = ugen_do_port_feature(f,
*u.pint, 0, UHF_PORT_ENABLE);
break;
case USB_FS_INIT:
/* verify input parameters */
if (u.pinit->pEndpoints == NULL) {
error = EINVAL;
break;
}
if (u.pinit->ep_index_max > 127) {
error = EINVAL;
break;
}
if (u.pinit->ep_index_max == 0) {
error = EINVAL;
break;
}
if (f->fs_xfer != NULL) {
error = EBUSY;
break;
}
if (f->dev_ep_index != 0) {
error = EINVAL;
break;
}
if (ugen_fifo_in_use(f, fflags)) {
error = EBUSY;
break;
}
error = usb_fifo_alloc_buffer(f, 1, u.pinit->ep_index_max);
if (error) {
break;
}
f->fs_xfer = malloc(sizeof(f->fs_xfer[0]) *
u.pinit->ep_index_max, M_USB, M_WAITOK | M_ZERO);
if (f->fs_xfer == NULL) {
usb_fifo_free_buffer(f);
error = ENOMEM;
break;
}
f->fs_ep_max = u.pinit->ep_index_max;
f->fs_ep_ptr = u.pinit->pEndpoints;
break;
case USB_FS_UNINIT:
if (u.puninit->dummy != 0) {
error = EINVAL;
break;
}
error = ugen_fs_uninit(f);
break;
default:
mtx_lock(f->priv_mtx);
error = ugen_iface_ioctl(f, cmd, addr, fflags);
mtx_unlock(f->priv_mtx);
break;
}
DPRINTFN(6, "error=%d\n", error);
return (error);
}
static void
ugen_ctrl_fs_callback(struct usb_xfer *xfer, usb_error_t error)
{
; /* workaround for a bug in "indent" */
DPRINTF("st=%u alen=%u aframes=%u\n",
USB_GET_STATE(xfer), xfer->actlen, xfer->aframes);
switch (USB_GET_STATE(xfer)) {
case USB_ST_SETUP:
usbd_transfer_submit(xfer);
break;
default:
ugen_fs_set_complete(xfer->priv_sc, USB_P2U(xfer->priv_fifo));
break;
}
}
#endif /* USB_HAVE_UGEN */
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