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NetBSD/sys/dev/usb/udsir.c

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/* $NetBSD: udsir.c,v 1.1 2013/05/28 12:03:26 kiyohara Exp $ */
/*
* Copyright (c) 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by David Sainty <David.Sainty@dtsp.co.nz>
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: udsir.c,v 1.1 2013/05/28 12:03:26 kiyohara Exp $");
#include <sys/param.h>
#include <sys/device.h>
#include <sys/errno.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/conf.h>
#include <sys/file.h>
#include <sys/poll.h>
#include <sys/select.h>
#include <sys/proc.h>
#include <sys/kthread.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdevs.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#include <dev/ir/ir.h>
#include <dev/ir/irdaio.h>
#include <dev/ir/irframevar.h>
#include <dev/ir/sir.h>
#ifdef UDSIR_DEBUG
#define DPRINTFN(n,x) if (udsirdebug > (n)) printf x
int udsirdebug = 0;
#else
#define DPRINTFN(n,x)
#endif
/* Max size with framing. */
#define MAX_UDSIR_OUTPUT_FRAME (2 * IRDA_MAX_FRAME_SIZE + IRDA_MAX_EBOFS + 4)
struct udsir_softc {
device_t sc_dev;
usbd_device_handle sc_udev;
usbd_interface_handle sc_iface;
uint8_t *sc_ur_buf; /* Unencapsulated frame */
u_int sc_ur_framelen;
uint8_t *sc_rd_buf; /* Raw incoming data stream */
int sc_rd_maxpsz;
size_t sc_rd_index;
int sc_rd_addr;
usbd_pipe_handle sc_rd_pipe;
usbd_xfer_handle sc_rd_xfer;
u_int sc_rd_count;
int sc_rd_readinprogress;
int sc_rd_expectdataticks;
u_char sc_rd_err;
struct framestate sc_framestate;
struct lwp *sc_thread;
struct selinfo sc_rd_sel;
uint8_t *sc_wr_buf;
int sc_wr_maxpsz;
int sc_wr_addr;
int sc_wr_stalewrite;
usbd_xfer_handle sc_wr_xfer;
usbd_pipe_handle sc_wr_pipe;
struct selinfo sc_wr_sel;
enum {
udir_input, /* Receiving data */
udir_output, /* Transmitting data */
udir_stalled, /* Error preventing data flow */
udir_idle /* Neither receiving nor transmitting */
} sc_direction;
device_t sc_child;
struct irda_params sc_params;
int sc_refcnt;
char sc_closing;
char sc_dying;
};
/* True if we cannot safely read data from the device */
#define UDSIR_BLOCK_RX_DATA(sc) ((sc)->sc_ur_framelen != 0)
#define UDSIR_WR_TIMEOUT 200
static int udsir_match(device_t, cfdata_t, void *);
static void udsir_attach(device_t, device_t, void *);
static int udsir_detach(device_t, int);
static void udsir_childdet(device_t, device_t);
static int udsir_activate(device_t, enum devact);
static int udsir_open(void *, int, int, struct lwp *);
static int udsir_close(void *, int, int, struct lwp *);
static int udsir_read(void *, struct uio *, int);
static int udsir_write(void *, struct uio *, int);
static int udsir_poll(void *, int, struct lwp *);
static int udsir_kqfilter(void *, struct knote *);
static int udsir_set_params(void *, struct irda_params *);
static int udsir_get_speeds(void *, int *);
static int udsir_get_turnarounds(void *, int *);
static void filt_udsirrdetach(struct knote *);
static int filt_udsirread(struct knote *, long);
static void filt_udsirwdetach(struct knote *);
static int filt_udsirwrite(struct knote *, long);
static void udsir_thread(void *);
#ifdef UDSIR_DEBUG
static void udsir_dumpdata(uint8_t const *, size_t, char const *);
#endif
static int deframe_rd_ur(struct udsir_softc *);
static void udsir_periodic(struct udsir_softc *);
static void udsir_rd_cb(usbd_xfer_handle, usbd_private_handle, usbd_status);
static usbd_status udsir_start_read(struct udsir_softc *);
CFATTACH_DECL2_NEW(udsir, sizeof(struct udsir_softc),
udsir_match, udsir_attach, udsir_detach,
udsir_activate, NULL, udsir_childdet);
static struct irframe_methods const udsir_methods = {
udsir_open, udsir_close, udsir_read, udsir_write, udsir_poll,
udsir_kqfilter, udsir_set_params, udsir_get_speeds, udsir_get_turnarounds,
};
static int
udsir_match(device_t parent, cfdata_t match, void *aux)
{
struct usbif_attach_arg *uaa = aux;
DPRINTFN(50, ("udsir_match\n"));
if (uaa->vendor == USB_VENDOR_KINGSUN &&
uaa->product == USB_PRODUCT_KINGSUN_IRDA)
return UMATCH_VENDOR_PRODUCT;
return UMATCH_NONE;
}
static void
udsir_attach(device_t parent, device_t self, void *aux)
{
struct udsir_softc *sc = device_private(self);
struct usbif_attach_arg *uaa = aux;
usbd_device_handle dev = uaa->device;
usbd_interface_handle iface = uaa->iface;
char *devinfop;
usb_endpoint_descriptor_t *ed;
uint8_t epcount;
int i;
struct ir_attach_args ia;
DPRINTFN(10, ("udsir_attach: sc=%p\n", sc));
sc->sc_dev = self;
aprint_naive("\n");
aprint_normal("\n");
devinfop = usbd_devinfo_alloc(dev, 0);
aprint_normal_dev(self, "%s\n", devinfop);
usbd_devinfo_free(devinfop);
sc->sc_udev = dev;
sc->sc_iface = iface;
epcount = 0;
(void)usbd_endpoint_count(iface, &epcount);
sc->sc_rd_addr = -1;
sc->sc_wr_addr = -1;
for (i = 0; i < epcount; i++) {
ed = usbd_interface2endpoint_descriptor(iface, i);
if (ed == NULL) {
aprint_error_dev(self, "couldn't get ep %d\n", i);
return;
}
if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) {
sc->sc_rd_addr = ed->bEndpointAddress;
sc->sc_rd_maxpsz = UGETW(ed->wMaxPacketSize);
} else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) {
sc->sc_wr_addr = ed->bEndpointAddress;
sc->sc_wr_maxpsz = UGETW(ed->wMaxPacketSize);
}
}
if (sc->sc_rd_addr == -1 || sc->sc_wr_addr == -1) {
aprint_error_dev(self, "missing endpoint\n");
return;
}
DPRINTFN(10, ("udsir_attach: %p\n", sc->sc_udev));
usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev,
sc->sc_dev);
ia.ia_type = IR_TYPE_IRFRAME;
ia.ia_methods = &udsir_methods;
ia.ia_handle = sc;
sc->sc_child = config_found(self, &ia, ir_print);
selinit(&sc->sc_rd_sel);
selinit(&sc->sc_wr_sel);
return;
}
static int
udsir_detach(device_t self, int flags)
{
struct udsir_softc *sc = device_private(self);
int s;
int rv = 0;
DPRINTFN(0, ("udsir_detach: sc=%p flags=%d\n", sc, flags));
sc->sc_closing = sc->sc_dying = 1;
wakeup(&sc->sc_thread);
while (sc->sc_thread != NULL)
tsleep(&sc->sc_closing, PWAIT, "usircl", 0);
/* Abort all pipes. Causes processes waiting for transfer to wake. */
if (sc->sc_rd_pipe != NULL) {
usbd_abort_pipe(sc->sc_rd_pipe);
usbd_close_pipe(sc->sc_rd_pipe);
sc->sc_rd_pipe = NULL;
}
if (sc->sc_wr_pipe != NULL) {
usbd_abort_pipe(sc->sc_wr_pipe);
usbd_close_pipe(sc->sc_wr_pipe);
sc->sc_wr_pipe = NULL;
}
wakeup(&sc->sc_ur_framelen);
wakeup(&sc->sc_wr_buf);
s = splusb();
if (--sc->sc_refcnt >= 0) {
/* Wait for processes to go away. */
usb_detach_waitold(sc->sc_dev);
}
splx(s);
if (sc->sc_child != NULL)
rv = config_detach(sc->sc_child, flags);
usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, sc->sc_dev);
seldestroy(&sc->sc_rd_sel);
seldestroy(&sc->sc_wr_sel);
return rv;
}
static void
udsir_childdet(device_t self, device_t child)
{
struct udsir_softc *sc = device_private(self);
KASSERT(sc->sc_child == child);
sc->sc_child = NULL;
}
static int
udsir_activate(device_t self, enum devact act)
{
struct udsir_softc *sc = device_private(self);
switch (act) {
case DVACT_DEACTIVATE:
sc->sc_dying = 1;
return 0;
default:
return EOPNOTSUPP;
}
}
/* ARGSUSED */
static int
udsir_open(void *h, int flag, int mode, struct lwp *l)
{
struct udsir_softc *sc = h;
int error;
usbd_status err;
DPRINTFN(0, ("%s: sc=%p\n", __func__, sc));
err = usbd_open_pipe(sc->sc_iface, sc->sc_rd_addr, 0, &sc->sc_rd_pipe);
if (err != USBD_NORMAL_COMPLETION) {
error = EIO;
goto bad1;
}
err = usbd_open_pipe(sc->sc_iface, sc->sc_wr_addr, 0, &sc->sc_wr_pipe);
if (err != USBD_NORMAL_COMPLETION) {
error = EIO;
goto bad2;
}
sc->sc_rd_xfer = usbd_alloc_xfer(sc->sc_udev);
if (sc->sc_rd_xfer == NULL) {
error = ENOMEM;
goto bad3;
}
sc->sc_wr_xfer = usbd_alloc_xfer(sc->sc_udev);
if (sc->sc_wr_xfer == NULL) {
error = ENOMEM;
goto bad4;
}
sc->sc_rd_buf = usbd_alloc_buffer(sc->sc_rd_xfer, sc->sc_rd_maxpsz);
if (sc->sc_rd_buf == NULL) {
error = ENOMEM;
goto bad5;
}
sc->sc_wr_buf = usbd_alloc_buffer(sc->sc_wr_xfer, IRDA_MAX_FRAME_SIZE);
if (sc->sc_wr_buf == NULL) {
error = ENOMEM;
goto bad5;
}
sc->sc_ur_buf = malloc(IRDA_MAX_FRAME_SIZE, M_USBDEV, M_NOWAIT);
if (sc->sc_ur_buf == NULL) {
error = ENOMEM;
goto bad5;
}
sc->sc_rd_index = sc->sc_rd_count = 0;
sc->sc_closing = 0;
sc->sc_rd_readinprogress = 0;
sc->sc_rd_expectdataticks = 0;
sc->sc_ur_framelen = 0;
sc->sc_rd_err = 0;
sc->sc_wr_stalewrite = 0;
sc->sc_direction = udir_idle;
sc->sc_params.speed = 0;
sc->sc_params.ebofs = 0;
sc->sc_params.maxsize = min(sc->sc_rd_maxpsz, sc->sc_wr_maxpsz);
deframe_init(&sc->sc_framestate, sc->sc_ur_buf, IRDA_MAX_FRAME_SIZE);
/* Increment reference for thread */
sc->sc_refcnt++;
error = kthread_create(PRI_NONE, 0, NULL, udsir_thread, sc,
&sc->sc_thread, "%s", device_xname(sc->sc_dev));
if (error) {
sc->sc_refcnt--;
goto bad5;
}
return 0;
bad5:
usbd_free_xfer(sc->sc_wr_xfer);
sc->sc_wr_xfer = NULL;
bad4:
usbd_free_xfer(sc->sc_rd_xfer);
sc->sc_rd_xfer = NULL;
bad3:
usbd_close_pipe(sc->sc_wr_pipe);
sc->sc_wr_pipe = NULL;
bad2:
usbd_close_pipe(sc->sc_rd_pipe);
sc->sc_rd_pipe = NULL;
bad1:
return error;
}
/* ARGSUSED */
static int
udsir_close(void *h, int flag, int mode, struct lwp *l)
{
struct udsir_softc *sc = h;
DPRINTFN(0, ("%s: sc=%p\n", __func__, sc));
sc->sc_refcnt++;
sc->sc_rd_readinprogress = 1;
sc->sc_closing = 1;
wakeup(&sc->sc_thread);
while (sc->sc_thread != NULL)
tsleep(&sc->sc_closing, PWAIT, "usircl", 0);
if (sc->sc_rd_pipe != NULL) {
usbd_abort_pipe(sc->sc_rd_pipe);
usbd_close_pipe(sc->sc_rd_pipe);
sc->sc_rd_pipe = NULL;
}
if (sc->sc_wr_pipe != NULL) {
usbd_abort_pipe(sc->sc_wr_pipe);
usbd_close_pipe(sc->sc_wr_pipe);
sc->sc_wr_pipe = NULL;
}
if (sc->sc_rd_xfer != NULL) {
usbd_free_xfer(sc->sc_rd_xfer);
sc->sc_rd_xfer = NULL;
sc->sc_rd_buf = NULL;
}
if (sc->sc_wr_xfer != NULL) {
usbd_free_xfer(sc->sc_wr_xfer);
sc->sc_wr_xfer = NULL;
sc->sc_wr_buf = NULL;
}
if (sc->sc_ur_buf != NULL) {
free(sc->sc_ur_buf, M_USBDEV);
sc->sc_ur_buf = NULL;
}
if (--sc->sc_refcnt < 0)
usb_detach_wakeupold(sc->sc_dev);
return 0;
}
/* ARGSUSED */
static int
udsir_read(void *h, struct uio *uio, int flag)
{
struct udsir_softc *sc = h;
int s;
int error;
u_int uframelen;
DPRINTFN(1, ("%s: sc=%p\n", __func__, sc));
if (sc->sc_dying)
return EIO;
#ifdef DIAGNOSTIC
if (sc->sc_rd_buf == NULL)
return EINVAL;
#endif
sc->sc_refcnt++;
if (!sc->sc_rd_readinprogress && !UDSIR_BLOCK_RX_DATA(sc))
/* Possibly wake up polling thread */
wakeup(&sc->sc_thread);
do {
s = splusb();
while (sc->sc_ur_framelen == 0) {
DPRINTFN(5, ("%s: calling tsleep()\n", __func__));
error = tsleep(&sc->sc_ur_framelen, PZERO | PCATCH,
"usirrd", 0);
if (sc->sc_dying)
error = EIO;
if (error) {
splx(s);
DPRINTFN(0, ("%s: tsleep() = %d\n",
__func__, error));
goto ret;
}
}
splx(s);
uframelen = sc->sc_ur_framelen;
DPRINTFN(1, ("%s: sc=%p framelen=%u, hdr=0x%02x\n",
__func__, sc, uframelen, sc->sc_ur_buf[0]));
if (uframelen > uio->uio_resid)
error = EINVAL;
else
error = uiomove(sc->sc_ur_buf, uframelen, uio);
sc->sc_ur_framelen = 0;
if (deframe_rd_ur(sc) == 0 && uframelen > 0) {
/*
* Need to wait for another read to obtain a
* complete frame... If we also obtained
* actual data, wake up the possibly sleeping
* thread immediately...
*/
wakeup(&sc->sc_thread);
}
} while (uframelen == 0);
DPRINTFN(1, ("%s: return %d\n", __func__, error));
ret:
if (--sc->sc_refcnt < 0)
usb_detach_wakeupold(sc->sc_dev);
return error;
}
/* ARGSUSED */
static int
udsir_write(void *h, struct uio *uio, int flag)
{
struct udsir_softc *sc = h;
usbd_status err;
uint32_t wrlen;
int error, sirlength;
uint8_t *wrbuf;
int s;
DPRINTFN(1, ("%s: sc=%p\n", __func__, sc));
if (sc->sc_dying)
return EIO;
#ifdef DIAGNOSTIC
if (sc->sc_wr_buf == NULL)
return EINVAL;
#endif
wrlen = uio->uio_resid;
if (wrlen > sc->sc_wr_maxpsz)
return EINVAL;
sc->sc_refcnt++;
if (!UDSIR_BLOCK_RX_DATA(sc)) {
/*
* If reads are not blocked, determine what action we
* should potentially take...
*/
if (sc->sc_direction == udir_output) {
/*
* If the last operation was an output, wait for the
* polling thread to check for incoming data.
*/
sc->sc_wr_stalewrite = 1;
wakeup(&sc->sc_thread);
} else if (!sc->sc_rd_readinprogress &&
(sc->sc_direction == udir_idle ||
sc->sc_direction == udir_input)) {
/* If idle, check for input before outputting */
udsir_start_read(sc);
}
}
s = splusb();
while (sc->sc_wr_stalewrite ||
(sc->sc_direction != udir_output &&
sc->sc_direction != udir_idle)) {
DPRINTFN(5, ("%s: sc=%p stalewrite=%d direction=%d, "
"calling tsleep()\n",
__func__, sc, sc->sc_wr_stalewrite,
sc->sc_direction));
error = tsleep(&sc->sc_wr_buf, PZERO | PCATCH, "usirwr", 0);
if (sc->sc_dying)
error = EIO;
if (error) {
splx(s);
DPRINTFN(0, ("%s: tsleep() = %d\n", __func__, error));
goto ret;
}
}
splx(s);
wrbuf = sc->sc_wr_buf;
sirlength = irda_sir_frame(wrbuf, MAX_UDSIR_OUTPUT_FRAME,
uio, sc->sc_params.ebofs);
if (sirlength < 0)
error = -sirlength;
else {
uint32_t btlen;
DPRINTFN(1, ("%s: transfer %u bytes\n",
__func__, (unsigned int)wrlen));
btlen = sirlength;
sc->sc_direction = udir_output;
#ifdef UDSIR_DEBUG
if (udsirdebug >= 20)
udsir_dumpdata(wrbuf, btlen, __func__);
#endif
err = usbd_intr_transfer(sc->sc_wr_xfer, sc->sc_wr_pipe,
USBD_FORCE_SHORT_XFER | USBD_NO_COPY,
UDSIR_WR_TIMEOUT, wrbuf, &btlen, "udsiwr");
DPRINTFN(2, ("%s: err=%d\n", __func__, err));
if (err != USBD_NORMAL_COMPLETION) {
if (err == USBD_INTERRUPTED)
error = EINTR;
else if (err == USBD_TIMEOUT)
error = ETIMEDOUT;
else
error = EIO;
} else
error = 0;
}
ret:
if (--sc->sc_refcnt < 0)
usb_detach_wakeupold(sc->sc_dev);
DPRINTFN(1, ("%s: sc=%p done\n", __func__, sc));
return error;
}
static int
udsir_poll(void *h, int events, struct lwp *l)
{
struct udsir_softc *sc = h;
int revents = 0;
DPRINTFN(1, ("%s: sc=%p\n", __func__, sc));
if (events & (POLLOUT | POLLWRNORM)) {
if (sc->sc_direction != udir_input)
revents |= events & (POLLOUT | POLLWRNORM);
else {
DPRINTFN(2, ("%s: recording write select\n", __func__));
selrecord(l, &sc->sc_wr_sel);
}
}
if (events & (POLLIN | POLLRDNORM)) {
if (sc->sc_ur_framelen != 0) {
DPRINTFN(2, ("%s: have data\n", __func__));
revents |= events & (POLLIN | POLLRDNORM);
} else {
DPRINTFN(2, ("%s: recording read select\n", __func__));
selrecord(l, &sc->sc_rd_sel);
}
}
return revents;
}
static const struct filterops udsirread_filtops =
{ 1, NULL, filt_udsirrdetach, filt_udsirread };
static const struct filterops udsirwrite_filtops =
{ 1, NULL, filt_udsirwdetach, filt_udsirwrite };
static int
udsir_kqfilter(void *h, struct knote *kn)
{
struct udsir_softc *sc = h;
struct klist *klist;
int s;
switch (kn->kn_filter) {
case EVFILT_READ:
klist = &sc->sc_rd_sel.sel_klist;
kn->kn_fop = &udsirread_filtops;
break;
case EVFILT_WRITE:
klist = &sc->sc_wr_sel.sel_klist;
kn->kn_fop = &udsirwrite_filtops;
break;
default:
return (EINVAL);
}
kn->kn_hook = sc;
s = splusb();
SLIST_INSERT_HEAD(klist, kn, kn_selnext);
splx(s);
return (0);
}
static int
udsir_set_params(void *h, struct irda_params *p)
{
struct udsir_softc *sc = h;
DPRINTFN(0, ("%s: sc=%p, speed=%d ebofs=%d maxsize=%d\n",
__func__, sc, p->speed, p->ebofs, p->maxsize));
if (sc->sc_dying)
return EIO;
if (p->speed != 9600)
return EINVAL;
if (p->maxsize != sc->sc_params.maxsize) {
if (p->maxsize > min(sc->sc_rd_maxpsz, sc->sc_wr_maxpsz))
return EINVAL;
sc->sc_params.maxsize = p->maxsize;
}
sc->sc_params = *p;
return 0;
}
static int
udsir_get_speeds(void *h, int *speeds)
{
struct udsir_softc *sc = h;
DPRINTFN(0, ("%s: sc=%p\n", __func__, sc));
if (sc->sc_dying)
return EIO;
/* Support only 9600bps now. */
*speeds = IRDA_SPEED_9600;
return 0;
}
static int
udsir_get_turnarounds(void *h, int *turnarounds)
{
struct udsir_softc *sc = h;
DPRINTFN(0, ("%s: sc=%p\n", __func__, sc));
if (sc->sc_dying)
return EIO;
/*
* Documentation is on the light side with respect to
* turnaround time for this device.
*/
*turnarounds = IRDA_TURNT_10000;
return 0;
}
static void
filt_udsirrdetach(struct knote *kn)
{
struct udsir_softc *sc = kn->kn_hook;
int s;
s = splusb();
SLIST_REMOVE(&sc->sc_rd_sel.sel_klist, kn, knote, kn_selnext);
splx(s);
}
/* ARGSUSED */
static int
filt_udsirread(struct knote *kn, long hint)
{
struct udsir_softc *sc = kn->kn_hook;
kn->kn_data = sc->sc_ur_framelen;
return (kn->kn_data > 0);
}
static void
filt_udsirwdetach(struct knote *kn)
{
struct udsir_softc *sc = kn->kn_hook;
int s;
s = splusb();
SLIST_REMOVE(&sc->sc_wr_sel.sel_klist, kn, knote, kn_selnext);
splx(s);
}
/* ARGSUSED */
static int
filt_udsirwrite(struct knote *kn, long hint)
{
struct udsir_softc *sc = kn->kn_hook;
kn->kn_data = 0;
return (sc->sc_direction != udir_input);
}
static void
udsir_thread(void *arg)
{
struct udsir_softc *sc = arg;
int error;
DPRINTFN(20, ("%s: starting polling thread\n", __func__));
while (!sc->sc_closing) {
if (!sc->sc_rd_readinprogress && !UDSIR_BLOCK_RX_DATA(sc))
udsir_periodic(sc);
if (!sc->sc_closing) {
error = tsleep(&sc->sc_thread, PWAIT, "udsir", hz / 10);
if (error == EWOULDBLOCK &&
sc->sc_rd_expectdataticks > 0)
/*
* After a timeout decrement the tick
* counter within which time we expect
* data to arrive if we are receiving
* data...
*/
sc->sc_rd_expectdataticks--;
}
}
DPRINTFN(20, ("%s: exiting polling thread\n", __func__));
sc->sc_thread = NULL;
wakeup(&sc->sc_closing);
if (--sc->sc_refcnt < 0)
usb_detach_wakeupold(sc->sc_dev);
kthread_exit(0);
}
#ifdef UDSIR_DEBUG
static void
udsir_dumpdata(uint8_t const *data, size_t dlen, char const *desc)
{
size_t bdindex;
printf("%s: (%lx)", desc, (unsigned long)dlen);
for (bdindex = 0; bdindex < dlen; bdindex++)
printf(" %02x", (unsigned int)data[bdindex]);
printf("\n");
}
#endif
/* Returns 0 if more data required, 1 if a complete frame was extracted */
static int
deframe_rd_ur(struct udsir_softc *sc)
{
if (sc->sc_rd_index == 0) {
KASSERT(sc->sc_rd_count == sc->sc_rd_maxpsz);
/* valid count */
sc->sc_rd_count = sc->sc_rd_buf[sc->sc_rd_index++] + 1;
KASSERT(sc->sc_rd_count < sc->sc_rd_maxpsz);
}
while (sc->sc_rd_index < sc->sc_rd_count) {
uint8_t const *buf;
size_t buflen;
enum frameresult fresult;
buf = &sc->sc_rd_buf[sc->sc_rd_index];
buflen = sc->sc_rd_count - sc->sc_rd_index;
fresult = deframe_process(&sc->sc_framestate, &buf, &buflen);
sc->sc_rd_index = sc->sc_rd_count - buflen;
DPRINTFN(1,("%s: result=%d\n", __func__, (int)fresult));
switch (fresult) {
case FR_IDLE:
case FR_INPROGRESS:
case FR_FRAMEBADFCS:
case FR_FRAMEMALFORMED:
case FR_BUFFEROVERRUN:
break;
case FR_FRAMEOK:
sc->sc_ur_framelen = sc->sc_framestate.bufindex;
wakeup(&sc->sc_ur_framelen); /* XXX should use flag */
selnotify(&sc->sc_rd_sel, 0, 0);
return 1;
}
}
/* Reset indices into USB-side buffer */
sc->sc_rd_index = sc->sc_rd_count = 0;
return 0;
}
/*
* Direction transitions:
*
* udsir_periodic() can switch the direction from:
*
* output -> idle
* output -> stalled
* stalled -> idle
* idle -> input
*
* udsir_rd_cb() can switch the direction from:
*
* input -> stalled
* input -> idle
*
* udsir_write() can switch the direction from:
*
* idle -> output
*/
static void
udsir_periodic(struct udsir_softc *sc)
{
DPRINTFN(60, ("%s: direction = %d\n", __func__, sc->sc_direction));
if (sc->sc_wr_stalewrite && sc->sc_direction == udir_idle) {
/*
* In a stale write case, we need to check if the
* write has completed. Once that has happened, the
* write is no longer stale.
*
* But note that we may immediately start a read poll...
*/
sc->sc_wr_stalewrite = 0;
wakeup(&sc->sc_wr_buf);
}
if (!sc->sc_rd_readinprogress &&
(sc->sc_direction == udir_idle ||
sc->sc_direction == udir_input))
/* Do a read poll if appropriate... */
udsir_start_read(sc);
}
static void
udsir_rd_cb(usbd_xfer_handle xfer, usbd_private_handle priv, usbd_status status)
{
struct udsir_softc *sc = priv;
uint32_t size;
DPRINTFN(60, ("%s: sc=%p\n", __func__, sc));
/* Read is no longer in progress */
sc->sc_rd_readinprogress = 0;
if (status == USBD_CANCELLED || sc->sc_closing) /* this is normal */
return;
if (status) {
size = 0;
sc->sc_rd_err = 1;
if (sc->sc_direction == udir_input ||
sc->sc_direction == udir_idle) {
/*
* Receive error, probably need to clear error
* condition.
*/
sc->sc_direction = udir_stalled;
}
} else
usbd_get_xfer_status(xfer, NULL, NULL, &size, NULL);
sc->sc_rd_index = 0;
sc->sc_rd_count = size;
DPRINTFN(((size > 0 || sc->sc_rd_err != 0) ? 20 : 60),
("%s: sc=%p size=%u, err=%d\n",
__func__, sc, size, sc->sc_rd_err));
#ifdef UDSIR_DEBUG
if (udsirdebug >= 20 && size > 0)
udsir_dumpdata(sc->sc_rd_buf, size, __func__);
#endif
if (deframe_rd_ur(sc) == 0) {
if (!deframe_isclear(&sc->sc_framestate) && size == 0 &&
sc->sc_rd_expectdataticks == 0) {
/*
* Expected data, but didn't get it
* within expected time...
*/
DPRINTFN(5,("%s: incoming packet timeout\n",
__func__));
deframe_clear(&sc->sc_framestate);
} else if (size > 0) {
/*
* If we also received actual data, reset the
* data read timeout and wake up the possibly
* sleeping thread...
*/
sc->sc_rd_expectdataticks = 2;
wakeup(&sc->sc_thread);
}
}
/*
* Check if incoming data has stopped, or that we cannot
* safely read any more data. In the case of the latter we
* must switch to idle so that a write will not block...
*/
if (sc->sc_direction == udir_input &&
((size == 0 && sc->sc_rd_expectdataticks == 0) ||
UDSIR_BLOCK_RX_DATA(sc))) {
DPRINTFN(8, ("%s: idling on packet timeout, "
"complete frame, or no data\n", __func__));
sc->sc_direction = udir_idle;
/* Wake up for possible output */
wakeup(&sc->sc_wr_buf);
selnotify(&sc->sc_wr_sel, 0, 0);
}
}
static usbd_status
udsir_start_read(struct udsir_softc *sc)
{
usbd_status err;
DPRINTFN(60, ("%s: sc=%p, size=%d\n", __func__, sc, sc->sc_rd_maxpsz));
if (sc->sc_dying)
return USBD_IOERROR;
if (UDSIR_BLOCK_RX_DATA(sc) || deframe_rd_ur(sc)) {
/*
* Can't start reading just yet. Since we aren't
* going to start a read, have to switch direction to
* idle.
*/
sc->sc_direction = udir_idle;
return USBD_NORMAL_COMPLETION;
}
/* Starting a read... */
sc->sc_rd_readinprogress = 1;
sc->sc_direction = udir_input;
if (sc->sc_rd_err) {
sc->sc_rd_err = 0;
DPRINTFN(0, ("%s: clear stall\n", __func__));
usbd_clear_endpoint_stall(sc->sc_rd_pipe);
}
usbd_setup_xfer(sc->sc_rd_xfer, sc->sc_rd_pipe, sc, sc->sc_rd_buf,
sc->sc_rd_maxpsz, USBD_SHORT_XFER_OK | USBD_NO_COPY,
USBD_NO_TIMEOUT, udsir_rd_cb);
err = usbd_transfer(sc->sc_rd_xfer);
if (err != USBD_IN_PROGRESS) {
DPRINTFN(0, ("%s: err=%d\n", __func__, (int)err));
return err;
}
return USBD_NORMAL_COMPLETION;
}
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