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freebsd-dev/sys/dev/usb/usb_generic.c
Hans Petter Selasky d6f4a9f9f6 Fix a deadlock when trying to power off a USB device. The deadlock 
happens because the code in question is trying to modify the parent
USB port registers outside the USB explore thread.

MFC after:	3 days
2013-10-27 10:09:53 +00:00

2350 lines
52 KiB
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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_RW | CTLFLAG_TUN, &ugen_debug,
0, "Debug level");
TUNABLE_INT("hw.usb.ugen.debug", &ugen_debug);
#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;
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;
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);
}
if (f->udev->curr_config_index == index) {
/* no change needed */
return (0);
}
/* 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_config_index(f->udev, index)) {
return (EIO);
}
/* probe and attach */
if (usb_probe_and_attach(f->udev, USB_IFACE_INDEX_ANY)) {
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);
}
/*
* This function is called having the enumeration SX locked which
* protects the scratch area used.
*/
static int
ugen_get_sdesc(struct usb_fifo *f, struct usb_gen_descriptor *ugd)
{
void *ptr;
uint16_t size;
int error;
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);
}
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);
}
if (udev->parent_hub == NULL) {
/* the root HUB cannot be re-enumerated */
DPRINTFN(6, "cannot reset root HUB\n");
return (EINVAL);
}
/* 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 port index array */
next = udev;
while (next->parent_hub != NULL) {
nlevel--;
dpp->udp_port_no[nlevel] = next->port_no;
dpp->udp_port_level = nlevel;
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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