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uhci.c revision 1.193
      1 /*	$NetBSD: uhci.c,v 1.193 2006/03/05 23:12:58 augustss Exp $	*/
      2 /*	$FreeBSD: src/sys/dev/usb/uhci.c,v 1.33 1999/11/17 22:33:41 n_hibma Exp $	*/
      3 
      4 /*
      5  * Copyright (c) 1998, 2004 The NetBSD Foundation, Inc.
      6  * All rights reserved.
      7  *
      8  * This code is derived from software contributed to The NetBSD Foundation
      9  * by Lennart Augustsson (lennart (at) augustsson.net) at
     10  * Carlstedt Research & Technology.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions and the following disclaimer.
     17  * 2. Redistributions in binary form must reproduce the above copyright
     18  *    notice, this list of conditions and the following disclaimer in the
     19  *    documentation and/or other materials provided with the distribution.
     20  * 3. All advertising materials mentioning features or use of this software
     21  *    must display the following acknowledgement:
     22  *        This product includes software developed by the NetBSD
     23  *        Foundation, Inc. and its contributors.
     24  * 4. Neither the name of The NetBSD Foundation nor the names of its
     25  *    contributors may be used to endorse or promote products derived
     26  *    from this software without specific prior written permission.
     27  *
     28  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     29  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     30  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     31  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     32  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     33  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     34  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     35  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     36  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     37  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     38  * POSSIBILITY OF SUCH DAMAGE.
     39  */
     40 
     41 /*
     42  * USB Universal Host Controller driver.
     43  * Handles e.g. PIIX3 and PIIX4.
     44  *
     45  * UHCI spec: http://developer.intel.com/design/USB/UHCI11D.htm
     46  * USB spec: http://www.usb.org/developers/docs/usbspec.zip
     47  * PIIXn spec: ftp://download.intel.com/design/intarch/datashts/29055002.pdf
     48  *             ftp://download.intel.com/design/intarch/datashts/29056201.pdf
     49  */
     50 
     51 #include <sys/cdefs.h>
     52 __KERNEL_RCSID(0, "$NetBSD: uhci.c,v 1.193 2006/03/05 23:12:58 augustss Exp $");
     53 
     54 #include <sys/param.h>
     55 #include <sys/systm.h>
     56 #include <sys/kernel.h>
     57 #include <sys/malloc.h>
     58 #if defined(__NetBSD__) || defined(__OpenBSD__)
     59 #include <sys/device.h>
     60 #include <sys/select.h>
     61 #include <sys/extent.h>
     62 #include <uvm/uvm_extern.h>
     63 #elif defined(__FreeBSD__)
     64 #include <sys/module.h>
     65 #include <sys/bus.h>
     66 #include <machine/bus_pio.h>
     67 #if defined(DIAGNOSTIC) && defined(__i386__)
     68 #include <machine/cpu.h>
     69 #endif
     70 #endif
     71 #include <sys/proc.h>
     72 #include <sys/queue.h>
     73 
     74 #include <machine/bus.h>
     75 #include <machine/endian.h>
     76 
     77 #include <dev/usb/usb.h>
     78 #include <dev/usb/usbdi.h>
     79 #include <dev/usb/usbdivar.h>
     80 #include <dev/usb/usb_mem.h>
     81 #include <dev/usb/usb_quirks.h>
     82 
     83 #include <dev/usb/uhcireg.h>
     84 #include <dev/usb/uhcivar.h>
     85 
     86 /* Use bandwidth reclamation for control transfers. Some devices choke on it. */
     87 /*#define UHCI_CTL_LOOP */
     88 
     89 #if defined(__FreeBSD__)
     90 #include <machine/clock.h>
     91 
     92 #define delay(d)		DELAY(d)
     93 #endif
     94 
     95 #if defined(__OpenBSD__)
     96 struct cfdriver uhci_cd = {
     97 	NULL, "uhci", DV_DULL
     98 };
     99 #endif
    100 
    101 #ifdef UHCI_DEBUG
    102 uhci_softc_t *thesc;
    103 #define DPRINTF(x)	if (uhcidebug) printf x
    104 #define DPRINTFN(n,x)	if (uhcidebug>(n)) printf x
    105 int uhcidebug = 0;
    106 int uhcinoloop = 0;
    107 #ifndef __NetBSD__
    108 #define bitmask_snprintf(q,f,b,l) snprintf((b), (l), "%b", (q), (f))
    109 #endif
    110 #else
    111 #define DPRINTF(x)
    112 #define DPRINTFN(n,x)
    113 #endif
    114 
    115 /*
    116  * The UHCI controller is little endian, so on big endian machines
    117  * the data stored in memory needs to be swapped.
    118  */
    119 #if defined(__FreeBSD__) || defined(__OpenBSD__)
    120 #if BYTE_ORDER == BIG_ENDIAN
    121 #define htole32(x) (bswap32(x))
    122 #define le32toh(x) (bswap32(x))
    123 #else
    124 #define htole32(x) (x)
    125 #define le32toh(x) (x)
    126 #endif
    127 #endif
    128 
    129 struct uhci_pipe {
    130 	struct usbd_pipe pipe;
    131 	int nexttoggle;
    132 
    133 	u_char aborting;
    134 	usbd_xfer_handle abortstart, abortend;
    135 
    136 	/* Info needed for different pipe kinds. */
    137 	union {
    138 		/* Control pipe */
    139 		struct {
    140 			uhci_soft_qh_t *sqh;
    141 			usb_dma_t reqdma;
    142 			uhci_soft_td_t *setup, *stat;
    143 			u_int length;
    144 		} ctl;
    145 		/* Interrupt pipe */
    146 		struct {
    147 			int npoll;
    148 			int isread;
    149 			uhci_soft_qh_t **qhs;
    150 		} intr;
    151 		/* Bulk pipe */
    152 		struct {
    153 			uhci_soft_qh_t *sqh;
    154 			u_int length;
    155 			int isread;
    156 		} bulk;
    157 		/* Iso pipe */
    158 		struct iso {
    159 			uhci_soft_td_t **stds;
    160 			int next, inuse;
    161 		} iso;
    162 	} u;
    163 };
    164 
    165 Static void		uhci_globalreset(uhci_softc_t *);
    166 Static usbd_status	uhci_portreset(uhci_softc_t*, int);
    167 Static void		uhci_reset(uhci_softc_t *);
    168 Static void		uhci_shutdown(void *v);
    169 Static void		uhci_power(int, void *);
    170 Static usbd_status	uhci_run(uhci_softc_t *, int run);
    171 Static uhci_soft_td_t  *uhci_alloc_std(uhci_softc_t *);
    172 Static void		uhci_free_std(uhci_softc_t *, uhci_soft_td_t *);
    173 Static uhci_soft_qh_t  *uhci_alloc_sqh(uhci_softc_t *);
    174 Static void		uhci_free_sqh(uhci_softc_t *, uhci_soft_qh_t *);
    175 #if 0
    176 Static void		uhci_enter_ctl_q(uhci_softc_t *, uhci_soft_qh_t *,
    177 					 uhci_intr_info_t *);
    178 Static void		uhci_exit_ctl_q(uhci_softc_t *, uhci_soft_qh_t *);
    179 #endif
    180 
    181 Static void		uhci_free_std_chain(uhci_softc_t *,
    182 					    uhci_soft_td_t *, uhci_soft_td_t *);
    183 Static usbd_status	uhci_alloc_std_chain(struct uhci_pipe *,
    184 			    uhci_softc_t *, int, int, u_int16_t, usb_dma_t *,
    185 			    uhci_soft_td_t **, uhci_soft_td_t **);
    186 Static void		uhci_poll_hub(void *);
    187 Static void		uhci_waitintr(uhci_softc_t *, usbd_xfer_handle);
    188 Static void		uhci_check_intr(uhci_softc_t *, uhci_intr_info_t *);
    189 Static void		uhci_idone(uhci_intr_info_t *);
    190 
    191 Static void		uhci_abort_xfer(usbd_xfer_handle, usbd_status status);
    192 
    193 Static void		uhci_timeout(void *);
    194 Static void		uhci_timeout_task(void *);
    195 Static void		uhci_add_ls_ctrl(uhci_softc_t *, uhci_soft_qh_t *);
    196 Static void		uhci_add_hs_ctrl(uhci_softc_t *, uhci_soft_qh_t *);
    197 Static void		uhci_add_bulk(uhci_softc_t *, uhci_soft_qh_t *);
    198 Static void		uhci_remove_ls_ctrl(uhci_softc_t *,uhci_soft_qh_t *);
    199 Static void		uhci_remove_hs_ctrl(uhci_softc_t *,uhci_soft_qh_t *);
    200 Static void		uhci_remove_bulk(uhci_softc_t *,uhci_soft_qh_t *);
    201 Static int		uhci_str(usb_string_descriptor_t *, int, const char *);
    202 Static void		uhci_add_loop(uhci_softc_t *sc);
    203 Static void		uhci_rem_loop(uhci_softc_t *sc);
    204 
    205 Static usbd_status	uhci_setup_isoc(usbd_pipe_handle pipe);
    206 Static void		uhci_device_isoc_enter(usbd_xfer_handle);
    207 
    208 Static usbd_status	uhci_allocm(struct usbd_bus *, usb_dma_t *, u_int32_t);
    209 Static void		uhci_freem(struct usbd_bus *, usb_dma_t *);
    210 
    211 Static usbd_xfer_handle	uhci_allocx(struct usbd_bus *);
    212 Static void		uhci_freex(struct usbd_bus *, usbd_xfer_handle);
    213 
    214 Static usbd_status	uhci_device_ctrl_transfer(usbd_xfer_handle);
    215 Static usbd_status	uhci_device_ctrl_start(usbd_xfer_handle);
    216 Static void		uhci_device_ctrl_abort(usbd_xfer_handle);
    217 Static void		uhci_device_ctrl_close(usbd_pipe_handle);
    218 Static void		uhci_device_ctrl_done(usbd_xfer_handle);
    219 
    220 Static usbd_status	uhci_device_intr_transfer(usbd_xfer_handle);
    221 Static usbd_status	uhci_device_intr_start(usbd_xfer_handle);
    222 Static void		uhci_device_intr_abort(usbd_xfer_handle);
    223 Static void		uhci_device_intr_close(usbd_pipe_handle);
    224 Static void		uhci_device_intr_done(usbd_xfer_handle);
    225 
    226 Static usbd_status	uhci_device_bulk_transfer(usbd_xfer_handle);
    227 Static usbd_status	uhci_device_bulk_start(usbd_xfer_handle);
    228 Static void		uhci_device_bulk_abort(usbd_xfer_handle);
    229 Static void		uhci_device_bulk_close(usbd_pipe_handle);
    230 Static void		uhci_device_bulk_done(usbd_xfer_handle);
    231 
    232 Static usbd_status	uhci_device_isoc_transfer(usbd_xfer_handle);
    233 Static usbd_status	uhci_device_isoc_start(usbd_xfer_handle);
    234 Static void		uhci_device_isoc_abort(usbd_xfer_handle);
    235 Static void		uhci_device_isoc_close(usbd_pipe_handle);
    236 Static void		uhci_device_isoc_done(usbd_xfer_handle);
    237 
    238 Static usbd_status	uhci_root_ctrl_transfer(usbd_xfer_handle);
    239 Static usbd_status	uhci_root_ctrl_start(usbd_xfer_handle);
    240 Static void		uhci_root_ctrl_abort(usbd_xfer_handle);
    241 Static void		uhci_root_ctrl_close(usbd_pipe_handle);
    242 Static void		uhci_root_ctrl_done(usbd_xfer_handle);
    243 
    244 Static usbd_status	uhci_root_intr_transfer(usbd_xfer_handle);
    245 Static usbd_status	uhci_root_intr_start(usbd_xfer_handle);
    246 Static void		uhci_root_intr_abort(usbd_xfer_handle);
    247 Static void		uhci_root_intr_close(usbd_pipe_handle);
    248 Static void		uhci_root_intr_done(usbd_xfer_handle);
    249 
    250 Static usbd_status	uhci_open(usbd_pipe_handle);
    251 Static void		uhci_poll(struct usbd_bus *);
    252 Static void		uhci_softintr(void *);
    253 
    254 Static usbd_status	uhci_device_request(usbd_xfer_handle xfer);
    255 
    256 Static void		uhci_add_intr(uhci_softc_t *, uhci_soft_qh_t *);
    257 Static void		uhci_remove_intr(uhci_softc_t *, uhci_soft_qh_t *);
    258 Static usbd_status	uhci_device_setintr(uhci_softc_t *sc,
    259 			    struct uhci_pipe *pipe, int ival);
    260 
    261 Static void		uhci_device_clear_toggle(usbd_pipe_handle pipe);
    262 Static void		uhci_noop(usbd_pipe_handle pipe);
    263 
    264 Static inline uhci_soft_qh_t *uhci_find_prev_qh(uhci_soft_qh_t *,
    265 						    uhci_soft_qh_t *);
    266 
    267 #ifdef UHCI_DEBUG
    268 Static void		uhci_dump_all(uhci_softc_t *);
    269 Static void		uhci_dumpregs(uhci_softc_t *);
    270 Static void		uhci_dump_qhs(uhci_soft_qh_t *);
    271 Static void		uhci_dump_qh(uhci_soft_qh_t *);
    272 Static void		uhci_dump_tds(uhci_soft_td_t *);
    273 Static void		uhci_dump_td(uhci_soft_td_t *);
    274 Static void		uhci_dump_ii(uhci_intr_info_t *ii);
    275 void			uhci_dump(void);
    276 #endif
    277 
    278 #define UBARR(sc) bus_space_barrier((sc)->iot, (sc)->ioh, 0, (sc)->sc_size, \
    279 			BUS_SPACE_BARRIER_READ|BUS_SPACE_BARRIER_WRITE)
    280 #define UWRITE1(sc, r, x) \
    281  do { UBARR(sc); bus_space_write_1((sc)->iot, (sc)->ioh, (r), (x)); \
    282  } while (/*CONSTCOND*/0)
    283 #define UWRITE2(sc, r, x) \
    284  do { UBARR(sc); bus_space_write_2((sc)->iot, (sc)->ioh, (r), (x)); \
    285  } while (/*CONSTCOND*/0)
    286 #define UWRITE4(sc, r, x) \
    287  do { UBARR(sc); bus_space_write_4((sc)->iot, (sc)->ioh, (r), (x)); \
    288  } while (/*CONSTCOND*/0)
    289 #define UREAD1(sc, r) (UBARR(sc), bus_space_read_1((sc)->iot, (sc)->ioh, (r)))
    290 #define UREAD2(sc, r) (UBARR(sc), bus_space_read_2((sc)->iot, (sc)->ioh, (r)))
    291 #define UREAD4(sc, r) (UBARR(sc), bus_space_read_4((sc)->iot, (sc)->ioh, (r)))
    292 
    293 #define UHCICMD(sc, cmd) UWRITE2(sc, UHCI_CMD, cmd)
    294 #define UHCISTS(sc) UREAD2(sc, UHCI_STS)
    295 
    296 #define UHCI_RESET_TIMEOUT 100	/* ms, reset timeout */
    297 
    298 #define UHCI_CURFRAME(sc) (UREAD2(sc, UHCI_FRNUM) & UHCI_FRNUM_MASK)
    299 
    300 #define UHCI_INTR_ENDPT 1
    301 
    302 struct usbd_bus_methods uhci_bus_methods = {
    303 	uhci_open,
    304 	uhci_softintr,
    305 	uhci_poll,
    306 	uhci_allocm,
    307 	uhci_freem,
    308 	uhci_allocx,
    309 	uhci_freex,
    310 };
    311 
    312 struct usbd_pipe_methods uhci_root_ctrl_methods = {
    313 	uhci_root_ctrl_transfer,
    314 	uhci_root_ctrl_start,
    315 	uhci_root_ctrl_abort,
    316 	uhci_root_ctrl_close,
    317 	uhci_noop,
    318 	uhci_root_ctrl_done,
    319 };
    320 
    321 struct usbd_pipe_methods uhci_root_intr_methods = {
    322 	uhci_root_intr_transfer,
    323 	uhci_root_intr_start,
    324 	uhci_root_intr_abort,
    325 	uhci_root_intr_close,
    326 	uhci_noop,
    327 	uhci_root_intr_done,
    328 };
    329 
    330 struct usbd_pipe_methods uhci_device_ctrl_methods = {
    331 	uhci_device_ctrl_transfer,
    332 	uhci_device_ctrl_start,
    333 	uhci_device_ctrl_abort,
    334 	uhci_device_ctrl_close,
    335 	uhci_noop,
    336 	uhci_device_ctrl_done,
    337 };
    338 
    339 struct usbd_pipe_methods uhci_device_intr_methods = {
    340 	uhci_device_intr_transfer,
    341 	uhci_device_intr_start,
    342 	uhci_device_intr_abort,
    343 	uhci_device_intr_close,
    344 	uhci_device_clear_toggle,
    345 	uhci_device_intr_done,
    346 };
    347 
    348 struct usbd_pipe_methods uhci_device_bulk_methods = {
    349 	uhci_device_bulk_transfer,
    350 	uhci_device_bulk_start,
    351 	uhci_device_bulk_abort,
    352 	uhci_device_bulk_close,
    353 	uhci_device_clear_toggle,
    354 	uhci_device_bulk_done,
    355 };
    356 
    357 struct usbd_pipe_methods uhci_device_isoc_methods = {
    358 	uhci_device_isoc_transfer,
    359 	uhci_device_isoc_start,
    360 	uhci_device_isoc_abort,
    361 	uhci_device_isoc_close,
    362 	uhci_noop,
    363 	uhci_device_isoc_done,
    364 };
    365 
    366 #define uhci_add_intr_info(sc, ii) \
    367 	LIST_INSERT_HEAD(&(sc)->sc_intrhead, (ii), list)
    368 #define uhci_del_intr_info(ii) \
    369 	do { \
    370 		LIST_REMOVE((ii), list); \
    371 		(ii)->list.le_prev = NULL; \
    372 	} while (0)
    373 #define uhci_active_intr_info(ii) ((ii)->list.le_prev != NULL)
    374 
    375 Static inline uhci_soft_qh_t *
    376 uhci_find_prev_qh(uhci_soft_qh_t *pqh, uhci_soft_qh_t *sqh)
    377 {
    378 	DPRINTFN(15,("uhci_find_prev_qh: pqh=%p sqh=%p\n", pqh, sqh));
    379 
    380 	for (; pqh->hlink != sqh; pqh = pqh->hlink) {
    381 #if defined(DIAGNOSTIC) || defined(UHCI_DEBUG)
    382 		if (le32toh(pqh->qh.qh_hlink) & UHCI_PTR_T) {
    383 			printf("uhci_find_prev_qh: QH not found\n");
    384 			return (NULL);
    385 		}
    386 #endif
    387 	}
    388 	return (pqh);
    389 }
    390 
    391 void
    392 uhci_globalreset(uhci_softc_t *sc)
    393 {
    394 	UHCICMD(sc, UHCI_CMD_GRESET);	/* global reset */
    395 	usb_delay_ms(&sc->sc_bus, USB_BUS_RESET_DELAY); /* wait a little */
    396 	UHCICMD(sc, 0);			/* do nothing */
    397 }
    398 
    399 usbd_status
    400 uhci_init(uhci_softc_t *sc)
    401 {
    402 	usbd_status err;
    403 	int i, j;
    404 	uhci_soft_qh_t *clsqh, *chsqh, *bsqh, *sqh, *lsqh;
    405 	uhci_soft_td_t *std;
    406 
    407 	DPRINTFN(1,("uhci_init: start\n"));
    408 
    409 #ifdef UHCI_DEBUG
    410 	thesc = sc;
    411 
    412 	if (uhcidebug > 2)
    413 		uhci_dumpregs(sc);
    414 #endif
    415 
    416 	UWRITE2(sc, UHCI_INTR, 0);		/* disable interrupts */
    417 	uhci_globalreset(sc);			/* reset the controller */
    418 	uhci_reset(sc);
    419 
    420 #ifdef __NetBSD__
    421 	usb_setup_reserve(sc, &sc->sc_dma_reserve, sc->sc_bus.dmatag,
    422 	    USB_MEM_RESERVE);
    423 #endif
    424 
    425 	/* Allocate and initialize real frame array. */
    426 	err = usb_allocmem(&sc->sc_bus,
    427 		  UHCI_FRAMELIST_COUNT * sizeof(uhci_physaddr_t),
    428 		  UHCI_FRAMELIST_ALIGN, &sc->sc_dma);
    429 	if (err)
    430 		return (err);
    431 	sc->sc_pframes = KERNADDR(&sc->sc_dma, 0);
    432 	UWRITE2(sc, UHCI_FRNUM, 0);		/* set frame number to 0 */
    433 	UWRITE4(sc, UHCI_FLBASEADDR, DMAADDR(&sc->sc_dma, 0)); /* set frame list*/
    434 
    435 	/*
    436 	 * Allocate a TD, inactive, that hangs from the last QH.
    437 	 * This is to avoid a bug in the PIIX that makes it run berserk
    438 	 * otherwise.
    439 	 */
    440 	std = uhci_alloc_std(sc);
    441 	if (std == NULL)
    442 		return (USBD_NOMEM);
    443 	std->link.std = NULL;
    444 	std->td.td_link = htole32(UHCI_PTR_T);
    445 	std->td.td_status = htole32(0); /* inactive */
    446 	std->td.td_token = htole32(0);
    447 	std->td.td_buffer = htole32(0);
    448 
    449 	/* Allocate the dummy QH marking the end and used for looping the QHs.*/
    450 	lsqh = uhci_alloc_sqh(sc);
    451 	if (lsqh == NULL)
    452 		return (USBD_NOMEM);
    453 	lsqh->hlink = NULL;
    454 	lsqh->qh.qh_hlink = htole32(UHCI_PTR_T);	/* end of QH chain */
    455 	lsqh->elink = std;
    456 	lsqh->qh.qh_elink = htole32(std->physaddr | UHCI_PTR_TD);
    457 	sc->sc_last_qh = lsqh;
    458 
    459 	/* Allocate the dummy QH where bulk traffic will be queued. */
    460 	bsqh = uhci_alloc_sqh(sc);
    461 	if (bsqh == NULL)
    462 		return (USBD_NOMEM);
    463 	bsqh->hlink = lsqh;
    464 	bsqh->qh.qh_hlink = htole32(lsqh->physaddr | UHCI_PTR_QH);
    465 	bsqh->elink = NULL;
    466 	bsqh->qh.qh_elink = htole32(UHCI_PTR_T);
    467 	sc->sc_bulk_start = sc->sc_bulk_end = bsqh;
    468 
    469 	/* Allocate dummy QH where high speed control traffic will be queued. */
    470 	chsqh = uhci_alloc_sqh(sc);
    471 	if (chsqh == NULL)
    472 		return (USBD_NOMEM);
    473 	chsqh->hlink = bsqh;
    474 	chsqh->qh.qh_hlink = htole32(bsqh->physaddr | UHCI_PTR_QH);
    475 	chsqh->elink = NULL;
    476 	chsqh->qh.qh_elink = htole32(UHCI_PTR_T);
    477 	sc->sc_hctl_start = sc->sc_hctl_end = chsqh;
    478 
    479 	/* Allocate dummy QH where control traffic will be queued. */
    480 	clsqh = uhci_alloc_sqh(sc);
    481 	if (clsqh == NULL)
    482 		return (USBD_NOMEM);
    483 	clsqh->hlink = bsqh;
    484 	clsqh->qh.qh_hlink = htole32(chsqh->physaddr | UHCI_PTR_QH);
    485 	clsqh->elink = NULL;
    486 	clsqh->qh.qh_elink = htole32(UHCI_PTR_T);
    487 	sc->sc_lctl_start = sc->sc_lctl_end = clsqh;
    488 
    489 	/*
    490 	 * Make all (virtual) frame list pointers point to the interrupt
    491 	 * queue heads and the interrupt queue heads at the control
    492 	 * queue head and point the physical frame list to the virtual.
    493 	 */
    494 	for(i = 0; i < UHCI_VFRAMELIST_COUNT; i++) {
    495 		std = uhci_alloc_std(sc);
    496 		sqh = uhci_alloc_sqh(sc);
    497 		if (std == NULL || sqh == NULL)
    498 			return (USBD_NOMEM);
    499 		std->link.sqh = sqh;
    500 		std->td.td_link = htole32(sqh->physaddr | UHCI_PTR_QH);
    501 		std->td.td_status = htole32(UHCI_TD_IOS); /* iso, inactive */
    502 		std->td.td_token = htole32(0);
    503 		std->td.td_buffer = htole32(0);
    504 		sqh->hlink = clsqh;
    505 		sqh->qh.qh_hlink = htole32(clsqh->physaddr | UHCI_PTR_QH);
    506 		sqh->elink = NULL;
    507 		sqh->qh.qh_elink = htole32(UHCI_PTR_T);
    508 		sc->sc_vframes[i].htd = std;
    509 		sc->sc_vframes[i].etd = std;
    510 		sc->sc_vframes[i].hqh = sqh;
    511 		sc->sc_vframes[i].eqh = sqh;
    512 		for (j = i;
    513 		     j < UHCI_FRAMELIST_COUNT;
    514 		     j += UHCI_VFRAMELIST_COUNT)
    515 			sc->sc_pframes[j] = htole32(std->physaddr);
    516 	}
    517 
    518 	LIST_INIT(&sc->sc_intrhead);
    519 
    520 	SIMPLEQ_INIT(&sc->sc_free_xfers);
    521 
    522 	usb_callout_init(sc->sc_poll_handle);
    523 
    524 	/* Set up the bus struct. */
    525 	sc->sc_bus.methods = &uhci_bus_methods;
    526 	sc->sc_bus.pipe_size = sizeof(struct uhci_pipe);
    527 
    528 #if defined(__NetBSD__) || defined(__OpenBSD__)
    529 	sc->sc_suspend = PWR_RESUME;
    530 	sc->sc_powerhook = powerhook_establish(uhci_power, sc);
    531 	sc->sc_shutdownhook = shutdownhook_establish(uhci_shutdown, sc);
    532 #endif
    533 
    534 	UHCICMD(sc, UHCI_CMD_MAXP); /* Assume 64 byte packets at frame end */
    535 
    536 	DPRINTFN(1,("uhci_init: enabling\n"));
    537 	UWRITE2(sc, UHCI_INTR, UHCI_INTR_TOCRCIE | UHCI_INTR_RIE |
    538 		UHCI_INTR_IOCE | UHCI_INTR_SPIE);	/* enable interrupts */
    539 
    540 	return (uhci_run(sc, 1));		/* and here we go... */
    541 }
    542 
    543 #if defined(__NetBSD__) || defined(__OpenBSD__)
    544 int
    545 uhci_activate(device_ptr_t self, enum devact act)
    546 {
    547 	struct uhci_softc *sc = (struct uhci_softc *)self;
    548 	int rv = 0;
    549 
    550 	switch (act) {
    551 	case DVACT_ACTIVATE:
    552 		return (EOPNOTSUPP);
    553 
    554 	case DVACT_DEACTIVATE:
    555 		if (sc->sc_child != NULL)
    556 			rv = config_deactivate(sc->sc_child);
    557 		break;
    558 	}
    559 	return (rv);
    560 }
    561 
    562 int
    563 uhci_detach(struct uhci_softc *sc, int flags)
    564 {
    565 	usbd_xfer_handle xfer;
    566 	int rv = 0;
    567 
    568 	if (sc->sc_child != NULL)
    569 		rv = config_detach(sc->sc_child, flags);
    570 
    571 	if (rv != 0)
    572 		return (rv);
    573 
    574 #if defined(__NetBSD__) || defined(__OpenBSD__)
    575 	powerhook_disestablish(sc->sc_powerhook);
    576 	shutdownhook_disestablish(sc->sc_shutdownhook);
    577 #endif
    578 
    579 	/* Free all xfers associated with this HC. */
    580 	for (;;) {
    581 		xfer = SIMPLEQ_FIRST(&sc->sc_free_xfers);
    582 		if (xfer == NULL)
    583 			break;
    584 		SIMPLEQ_REMOVE_HEAD(&sc->sc_free_xfers, next);
    585 		free(xfer, M_USB);
    586 	}
    587 
    588 	/* XXX free other data structures XXX */
    589 
    590 	return (rv);
    591 }
    592 #endif
    593 
    594 usbd_status
    595 uhci_allocm(struct usbd_bus *bus, usb_dma_t *dma, u_int32_t size)
    596 {
    597 	struct uhci_softc *sc = (struct uhci_softc *)bus;
    598 	usbd_status status;
    599 	u_int32_t n;
    600 
    601 	/*
    602 	 * XXX
    603 	 * Since we are allocating a buffer we can assume that we will
    604 	 * need TDs for it.  Since we don't want to allocate those from
    605 	 * an interrupt context, we allocate them here and free them again.
    606 	 * This is no guarantee that we'll get the TDs next time...
    607 	 */
    608 	n = size / 8;
    609 	if (n > 16) {
    610 		u_int32_t i;
    611 		uhci_soft_td_t **stds;
    612 		DPRINTF(("uhci_allocm: get %d TDs\n", n));
    613 		stds = malloc(sizeof(uhci_soft_td_t *) * n, M_TEMP,
    614 		    M_WAITOK|M_ZERO);
    615 		for(i=0; i < n; i++)
    616 			stds[i] = uhci_alloc_std(sc);
    617 		for(i=0; i < n; i++)
    618 			if (stds[i] != NULL)
    619 				uhci_free_std(sc, stds[i]);
    620 		free(stds, M_TEMP);
    621 	}
    622 
    623 
    624 	status = usb_allocmem(&sc->sc_bus, size, 0, dma);
    625 #ifdef __NetBSD__
    626 	if (status == USBD_NOMEM)
    627 		status = usb_reserve_allocm(&sc->sc_dma_reserve, dma, size);
    628 #endif
    629 	return status;
    630 }
    631 
    632 void
    633 uhci_freem(struct usbd_bus *bus, usb_dma_t *dma)
    634 {
    635 #ifdef __NetBSD__
    636 	if (dma->block->flags & USB_DMA_RESERVE) {
    637 		usb_reserve_freem(&((struct uhci_softc *)bus)->sc_dma_reserve,
    638 		    dma);
    639 		return;
    640 	}
    641 #endif
    642 	usb_freemem(&((struct uhci_softc *)bus)->sc_bus, dma);
    643 }
    644 
    645 usbd_xfer_handle
    646 uhci_allocx(struct usbd_bus *bus)
    647 {
    648 	struct uhci_softc *sc = (struct uhci_softc *)bus;
    649 	usbd_xfer_handle xfer;
    650 
    651 	xfer = SIMPLEQ_FIRST(&sc->sc_free_xfers);
    652 	if (xfer != NULL) {
    653 		SIMPLEQ_REMOVE_HEAD(&sc->sc_free_xfers, next);
    654 #ifdef DIAGNOSTIC
    655 		if (xfer->busy_free != XFER_FREE) {
    656 			printf("uhci_allocx: xfer=%p not free, 0x%08x\n", xfer,
    657 			       xfer->busy_free);
    658 		}
    659 #endif
    660 	} else {
    661 		xfer = malloc(sizeof(struct uhci_xfer), M_USB, M_NOWAIT);
    662 	}
    663 	if (xfer != NULL) {
    664 		memset(xfer, 0, sizeof (struct uhci_xfer));
    665 		UXFER(xfer)->iinfo.sc = sc;
    666 #ifdef DIAGNOSTIC
    667 		UXFER(xfer)->iinfo.isdone = 1;
    668 		xfer->busy_free = XFER_BUSY;
    669 #endif
    670 	}
    671 	return (xfer);
    672 }
    673 
    674 void
    675 uhci_freex(struct usbd_bus *bus, usbd_xfer_handle xfer)
    676 {
    677 	struct uhci_softc *sc = (struct uhci_softc *)bus;
    678 
    679 #ifdef DIAGNOSTIC
    680 	if (xfer->busy_free != XFER_BUSY) {
    681 		printf("uhci_freex: xfer=%p not busy, 0x%08x\n", xfer,
    682 		       xfer->busy_free);
    683 		return;
    684 	}
    685 	xfer->busy_free = XFER_FREE;
    686 	if (!UXFER(xfer)->iinfo.isdone) {
    687 		printf("uhci_freex: !isdone\n");
    688 		return;
    689 	}
    690 #endif
    691 	SIMPLEQ_INSERT_HEAD(&sc->sc_free_xfers, xfer, next);
    692 }
    693 
    694 /*
    695  * Shut down the controller when the system is going down.
    696  */
    697 void
    698 uhci_shutdown(void *v)
    699 {
    700 	uhci_softc_t *sc = v;
    701 	int s;
    702 
    703 	DPRINTF(("uhci_shutdown: stopping the HC\n"));
    704 
    705 	/*
    706 	 * Use polling mode to prevent the interrupts shutting
    707 	 * us down before we shut them down.
    708 	 */
    709 	s = splhardusb();
    710 	sc->sc_bus.use_polling++;
    711 	uhci_run(sc, 0); /* stop the controller */
    712 	sc->sc_bus.use_polling--;
    713 	splx(s);
    714 }
    715 
    716 /*
    717  * Handle suspend/resume.
    718  *
    719  * We need to switch to polling mode here, because this routine is
    720  * called from an interrupt context.  This is all right since we
    721  * are almost suspended anyway.
    722  */
    723 void
    724 uhci_power(int why, void *v)
    725 {
    726 	uhci_softc_t *sc = v;
    727 	int cmd;
    728 	int s;
    729 
    730 	s = splhardusb();
    731 	cmd = UREAD2(sc, UHCI_CMD);
    732 
    733 	DPRINTF(("uhci_power: sc=%p, why=%d (was %d), cmd=0x%x\n",
    734 		 sc, why, sc->sc_suspend, cmd));
    735 
    736 	switch (why) {
    737 	case PWR_SUSPEND:
    738 	case PWR_STANDBY:
    739 #ifdef UHCI_DEBUG
    740 		if (uhcidebug > 2)
    741 			uhci_dumpregs(sc);
    742 #endif
    743 		if (sc->sc_intr_xfer != NULL)
    744 			usb_uncallout(sc->sc_poll_handle, uhci_poll_hub,
    745 			    sc->sc_intr_xfer);
    746 		sc->sc_bus.use_polling++;
    747 		uhci_run(sc, 0); /* stop the controller */
    748 
    749 		/* save some state if BIOS doesn't */
    750 		sc->sc_saved_frnum = UREAD2(sc, UHCI_FRNUM);
    751 		sc->sc_saved_sof = UREAD1(sc, UHCI_SOF);
    752 
    753 		UWRITE2(sc, UHCI_INTR, 0); /* disable intrs */
    754 
    755 		UHCICMD(sc, cmd | UHCI_CMD_EGSM); /* enter global suspend */
    756 		usb_delay_ms(&sc->sc_bus, USB_RESUME_WAIT);
    757 		sc->sc_suspend = why;
    758 		sc->sc_bus.use_polling--;
    759 		DPRINTF(("uhci_power: cmd=0x%x\n", UREAD2(sc, UHCI_CMD)));
    760 		break;
    761 	case PWR_RESUME:
    762 #ifdef DIAGNOSTIC
    763 		if (sc->sc_suspend == PWR_RESUME)
    764 			printf("uhci_power: weird, resume without suspend.\n");
    765 #endif
    766 		sc->sc_bus.use_polling++;
    767 		sc->sc_suspend = why;
    768 		if (cmd & UHCI_CMD_RS)
    769 			uhci_run(sc, 0); /* in case BIOS has started it */
    770 
    771 		/* restore saved state */
    772 		UWRITE4(sc, UHCI_FLBASEADDR, DMAADDR(&sc->sc_dma, 0));
    773 		UWRITE2(sc, UHCI_FRNUM, sc->sc_saved_frnum);
    774 		UWRITE1(sc, UHCI_SOF, sc->sc_saved_sof);
    775 
    776 		UHCICMD(sc, cmd | UHCI_CMD_FGR); /* force global resume */
    777 		usb_delay_ms(&sc->sc_bus, USB_RESUME_DELAY);
    778 		UHCICMD(sc, cmd & ~UHCI_CMD_EGSM); /* back to normal */
    779 		UHCICMD(sc, UHCI_CMD_MAXP);
    780 		UWRITE2(sc, UHCI_INTR, UHCI_INTR_TOCRCIE | UHCI_INTR_RIE |
    781 			UHCI_INTR_IOCE | UHCI_INTR_SPIE); /* re-enable intrs */
    782 		uhci_run(sc, 1); /* and start traffic again */
    783 		usb_delay_ms(&sc->sc_bus, USB_RESUME_RECOVERY);
    784 		sc->sc_bus.use_polling--;
    785 		if (sc->sc_intr_xfer != NULL)
    786 			usb_callout(sc->sc_poll_handle, sc->sc_ival,
    787 				    uhci_poll_hub, sc->sc_intr_xfer);
    788 #ifdef UHCI_DEBUG
    789 		if (uhcidebug > 2)
    790 			uhci_dumpregs(sc);
    791 #endif
    792 		break;
    793 	case PWR_SOFTSUSPEND:
    794 	case PWR_SOFTSTANDBY:
    795 	case PWR_SOFTRESUME:
    796 		break;
    797 	}
    798 	splx(s);
    799 }
    800 
    801 #ifdef UHCI_DEBUG
    802 Static void
    803 uhci_dumpregs(uhci_softc_t *sc)
    804 {
    805 	DPRINTFN(-1,("%s regs: cmd=%04x, sts=%04x, intr=%04x, frnum=%04x, "
    806 		     "flbase=%08x, sof=%04x, portsc1=%04x, portsc2=%04x\n",
    807 		     USBDEVNAME(sc->sc_bus.bdev),
    808 		     UREAD2(sc, UHCI_CMD),
    809 		     UREAD2(sc, UHCI_STS),
    810 		     UREAD2(sc, UHCI_INTR),
    811 		     UREAD2(sc, UHCI_FRNUM),
    812 		     UREAD4(sc, UHCI_FLBASEADDR),
    813 		     UREAD1(sc, UHCI_SOF),
    814 		     UREAD2(sc, UHCI_PORTSC1),
    815 		     UREAD2(sc, UHCI_PORTSC2)));
    816 }
    817 
    818 void
    819 uhci_dump_td(uhci_soft_td_t *p)
    820 {
    821 	char sbuf[128], sbuf2[128];
    822 
    823 	DPRINTFN(-1,("TD(%p) at %08lx = link=0x%08lx status=0x%08lx "
    824 		     "token=0x%08lx buffer=0x%08lx\n",
    825 		     p, (long)p->physaddr,
    826 		     (long)le32toh(p->td.td_link),
    827 		     (long)le32toh(p->td.td_status),
    828 		     (long)le32toh(p->td.td_token),
    829 		     (long)le32toh(p->td.td_buffer)));
    830 
    831 	bitmask_snprintf((u_int32_t)le32toh(p->td.td_link), "\20\1T\2Q\3VF",
    832 			 sbuf, sizeof(sbuf));
    833 	bitmask_snprintf((u_int32_t)le32toh(p->td.td_status),
    834 			 "\20\22BITSTUFF\23CRCTO\24NAK\25BABBLE\26DBUFFER\27"
    835 			 "STALLED\30ACTIVE\31IOC\32ISO\33LS\36SPD",
    836 			 sbuf2, sizeof(sbuf2));
    837 
    838 	DPRINTFN(-1,("  %s %s,errcnt=%d,actlen=%d pid=%02x,addr=%d,endpt=%d,"
    839 		     "D=%d,maxlen=%d\n", sbuf, sbuf2,
    840 		     UHCI_TD_GET_ERRCNT(le32toh(p->td.td_status)),
    841 		     UHCI_TD_GET_ACTLEN(le32toh(p->td.td_status)),
    842 		     UHCI_TD_GET_PID(le32toh(p->td.td_token)),
    843 		     UHCI_TD_GET_DEVADDR(le32toh(p->td.td_token)),
    844 		     UHCI_TD_GET_ENDPT(le32toh(p->td.td_token)),
    845 		     UHCI_TD_GET_DT(le32toh(p->td.td_token)),
    846 		     UHCI_TD_GET_MAXLEN(le32toh(p->td.td_token))));
    847 }
    848 
    849 void
    850 uhci_dump_qh(uhci_soft_qh_t *sqh)
    851 {
    852 	DPRINTFN(-1,("QH(%p) at %08x: hlink=%08x elink=%08x\n", sqh,
    853 	    (int)sqh->physaddr, le32toh(sqh->qh.qh_hlink),
    854 	    le32toh(sqh->qh.qh_elink)));
    855 }
    856 
    857 
    858 #if 1
    859 void
    860 uhci_dump(void)
    861 {
    862 	uhci_dump_all(thesc);
    863 }
    864 #endif
    865 
    866 void
    867 uhci_dump_all(uhci_softc_t *sc)
    868 {
    869 	uhci_dumpregs(sc);
    870 	printf("intrs=%d\n", sc->sc_bus.no_intrs);
    871 	/*printf("framelist[i].link = %08x\n", sc->sc_framelist[0].link);*/
    872 	uhci_dump_qh(sc->sc_lctl_start);
    873 }
    874 
    875 
    876 void
    877 uhci_dump_qhs(uhci_soft_qh_t *sqh)
    878 {
    879 	uhci_dump_qh(sqh);
    880 
    881 	/* uhci_dump_qhs displays all the QHs and TDs from the given QH onwards
    882 	 * Traverses sideways first, then down.
    883 	 *
    884 	 * QH1
    885 	 * QH2
    886 	 * No QH
    887 	 * TD2.1
    888 	 * TD2.2
    889 	 * TD1.1
    890 	 * etc.
    891 	 *
    892 	 * TD2.x being the TDs queued at QH2 and QH1 being referenced from QH1.
    893 	 */
    894 
    895 
    896 	if (sqh->hlink != NULL && !(le32toh(sqh->qh.qh_hlink) & UHCI_PTR_T))
    897 		uhci_dump_qhs(sqh->hlink);
    898 	else
    899 		DPRINTF(("No QH\n"));
    900 
    901 	if (sqh->elink != NULL && !(le32toh(sqh->qh.qh_elink) & UHCI_PTR_T))
    902 		uhci_dump_tds(sqh->elink);
    903 	else
    904 		DPRINTF(("No TD\n"));
    905 }
    906 
    907 void
    908 uhci_dump_tds(uhci_soft_td_t *std)
    909 {
    910 	uhci_soft_td_t *td;
    911 
    912 	for(td = std; td != NULL; td = td->link.std) {
    913 		uhci_dump_td(td);
    914 
    915 		/* Check whether the link pointer in this TD marks
    916 		 * the link pointer as end of queue. This avoids
    917 		 * printing the free list in case the queue/TD has
    918 		 * already been moved there (seatbelt).
    919 		 */
    920 		if (le32toh(td->td.td_link) & UHCI_PTR_T ||
    921 		    le32toh(td->td.td_link) == 0)
    922 			break;
    923 	}
    924 }
    925 
    926 Static void
    927 uhci_dump_ii(uhci_intr_info_t *ii)
    928 {
    929 	usbd_pipe_handle pipe;
    930 	usb_endpoint_descriptor_t *ed;
    931 	usbd_device_handle dev;
    932 
    933 #ifdef DIAGNOSTIC
    934 #define DONE ii->isdone
    935 #else
    936 #define DONE 0
    937 #endif
    938         if (ii == NULL) {
    939                 printf("ii NULL\n");
    940                 return;
    941         }
    942         if (ii->xfer == NULL) {
    943 		printf("ii %p: done=%d xfer=NULL\n",
    944 		       ii, DONE);
    945                 return;
    946         }
    947         pipe = ii->xfer->pipe;
    948         if (pipe == NULL) {
    949 		printf("ii %p: done=%d xfer=%p pipe=NULL\n",
    950 		       ii, DONE, ii->xfer);
    951                 return;
    952 	}
    953         if (pipe->endpoint == NULL) {
    954 		printf("ii %p: done=%d xfer=%p pipe=%p pipe->endpoint=NULL\n",
    955 		       ii, DONE, ii->xfer, pipe);
    956                 return;
    957 	}
    958         if (pipe->device == NULL) {
    959 		printf("ii %p: done=%d xfer=%p pipe=%p pipe->device=NULL\n",
    960 		       ii, DONE, ii->xfer, pipe);
    961                 return;
    962 	}
    963         ed = pipe->endpoint->edesc;
    964         dev = pipe->device;
    965 	printf("ii %p: done=%d xfer=%p dev=%p vid=0x%04x pid=0x%04x addr=%d pipe=%p ep=0x%02x attr=0x%02x\n",
    966 	       ii, DONE, ii->xfer, dev,
    967 	       UGETW(dev->ddesc.idVendor),
    968 	       UGETW(dev->ddesc.idProduct),
    969 	       dev->address, pipe,
    970 	       ed->bEndpointAddress, ed->bmAttributes);
    971 #undef DONE
    972 }
    973 
    974 void uhci_dump_iis(struct uhci_softc *sc);
    975 void
    976 uhci_dump_iis(struct uhci_softc *sc)
    977 {
    978 	uhci_intr_info_t *ii;
    979 
    980 	printf("intr_info list:\n");
    981 	for (ii = LIST_FIRST(&sc->sc_intrhead); ii; ii = LIST_NEXT(ii, list))
    982 		uhci_dump_ii(ii);
    983 }
    984 
    985 void iidump(void);
    986 void iidump(void) { uhci_dump_iis(thesc); }
    987 
    988 #endif
    989 
    990 /*
    991  * This routine is executed periodically and simulates interrupts
    992  * from the root controller interrupt pipe for port status change.
    993  */
    994 void
    995 uhci_poll_hub(void *addr)
    996 {
    997 	usbd_xfer_handle xfer = addr;
    998 	usbd_pipe_handle pipe = xfer->pipe;
    999 	uhci_softc_t *sc = (uhci_softc_t *)pipe->device->bus;
   1000 	int s;
   1001 	u_char *p;
   1002 
   1003 	DPRINTFN(20, ("uhci_poll_hub\n"));
   1004 
   1005 	usb_callout(sc->sc_poll_handle, sc->sc_ival, uhci_poll_hub, xfer);
   1006 
   1007 	p = KERNADDR(&xfer->dmabuf, 0);
   1008 	p[0] = 0;
   1009 	if (UREAD2(sc, UHCI_PORTSC1) & (UHCI_PORTSC_CSC|UHCI_PORTSC_OCIC))
   1010 		p[0] |= 1<<1;
   1011 	if (UREAD2(sc, UHCI_PORTSC2) & (UHCI_PORTSC_CSC|UHCI_PORTSC_OCIC))
   1012 		p[0] |= 1<<2;
   1013 	if (p[0] == 0)
   1014 		/* No change, try again in a while */
   1015 		return;
   1016 
   1017 	xfer->actlen = 1;
   1018 	xfer->status = USBD_NORMAL_COMPLETION;
   1019 	s = splusb();
   1020 	xfer->device->bus->intr_context++;
   1021 	usb_transfer_complete(xfer);
   1022 	xfer->device->bus->intr_context--;
   1023 	splx(s);
   1024 }
   1025 
   1026 void
   1027 uhci_root_intr_done(usbd_xfer_handle xfer)
   1028 {
   1029 }
   1030 
   1031 void
   1032 uhci_root_ctrl_done(usbd_xfer_handle xfer)
   1033 {
   1034 }
   1035 
   1036 /*
   1037  * Let the last QH loop back to the high speed control transfer QH.
   1038  * This is what intel calls "bandwidth reclamation" and improves
   1039  * USB performance a lot for some devices.
   1040  * If we are already looping, just count it.
   1041  */
   1042 void
   1043 uhci_add_loop(uhci_softc_t *sc) {
   1044 #ifdef UHCI_DEBUG
   1045 	if (uhcinoloop)
   1046 		return;
   1047 #endif
   1048 	if (++sc->sc_loops == 1) {
   1049 		DPRINTFN(5,("uhci_start_loop: add\n"));
   1050 		/* Note, we don't loop back the soft pointer. */
   1051 		sc->sc_last_qh->qh.qh_hlink =
   1052 		    htole32(sc->sc_hctl_start->physaddr | UHCI_PTR_QH);
   1053 	}
   1054 }
   1055 
   1056 void
   1057 uhci_rem_loop(uhci_softc_t *sc) {
   1058 #ifdef UHCI_DEBUG
   1059 	if (uhcinoloop)
   1060 		return;
   1061 #endif
   1062 	if (--sc->sc_loops == 0) {
   1063 		DPRINTFN(5,("uhci_end_loop: remove\n"));
   1064 		sc->sc_last_qh->qh.qh_hlink = htole32(UHCI_PTR_T);
   1065 	}
   1066 }
   1067 
   1068 /* Add high speed control QH, called at splusb(). */
   1069 void
   1070 uhci_add_hs_ctrl(uhci_softc_t *sc, uhci_soft_qh_t *sqh)
   1071 {
   1072 	uhci_soft_qh_t *eqh;
   1073 
   1074 	SPLUSBCHECK;
   1075 
   1076 	DPRINTFN(10, ("uhci_add_ctrl: sqh=%p\n", sqh));
   1077 	eqh = sc->sc_hctl_end;
   1078 	sqh->hlink       = eqh->hlink;
   1079 	sqh->qh.qh_hlink = eqh->qh.qh_hlink;
   1080 	eqh->hlink       = sqh;
   1081 	eqh->qh.qh_hlink = htole32(sqh->physaddr | UHCI_PTR_QH);
   1082 	sc->sc_hctl_end = sqh;
   1083 #ifdef UHCI_CTL_LOOP
   1084 	uhci_add_loop(sc);
   1085 #endif
   1086 }
   1087 
   1088 /* Remove high speed control QH, called at splusb(). */
   1089 void
   1090 uhci_remove_hs_ctrl(uhci_softc_t *sc, uhci_soft_qh_t *sqh)
   1091 {
   1092 	uhci_soft_qh_t *pqh;
   1093 
   1094 	SPLUSBCHECK;
   1095 
   1096 	DPRINTFN(10, ("uhci_remove_hs_ctrl: sqh=%p\n", sqh));
   1097 #ifdef UHCI_CTL_LOOP
   1098 	uhci_rem_loop(sc);
   1099 #endif
   1100 	/*
   1101 	 * The T bit should be set in the elink of the QH so that the HC
   1102 	 * doesn't follow the pointer.  This condition may fail if the
   1103 	 * the transferred packet was short so that the QH still points
   1104 	 * at the last used TD.
   1105 	 * In this case we set the T bit and wait a little for the HC
   1106 	 * to stop looking at the TD.
   1107 	 */
   1108 	if (!(sqh->qh.qh_elink & htole32(UHCI_PTR_T))) {
   1109 		sqh->qh.qh_elink = htole32(UHCI_PTR_T);
   1110 		delay(UHCI_QH_REMOVE_DELAY);
   1111 	}
   1112 
   1113 	pqh = uhci_find_prev_qh(sc->sc_hctl_start, sqh);
   1114 	pqh->hlink = sqh->hlink;
   1115 	pqh->qh.qh_hlink = sqh->qh.qh_hlink;
   1116 	delay(UHCI_QH_REMOVE_DELAY);
   1117 	if (sc->sc_hctl_end == sqh)
   1118 		sc->sc_hctl_end = pqh;
   1119 }
   1120 
   1121 /* Add low speed control QH, called at splusb(). */
   1122 void
   1123 uhci_add_ls_ctrl(uhci_softc_t *sc, uhci_soft_qh_t *sqh)
   1124 {
   1125 	uhci_soft_qh_t *eqh;
   1126 
   1127 	SPLUSBCHECK;
   1128 
   1129 	DPRINTFN(10, ("uhci_add_ls_ctrl: sqh=%p\n", sqh));
   1130 	eqh = sc->sc_lctl_end;
   1131 	sqh->hlink = eqh->hlink;
   1132 	sqh->qh.qh_hlink = eqh->qh.qh_hlink;
   1133 	eqh->hlink = sqh;
   1134 	eqh->qh.qh_hlink = htole32(sqh->physaddr | UHCI_PTR_QH);
   1135 	sc->sc_lctl_end = sqh;
   1136 }
   1137 
   1138 /* Remove low speed control QH, called at splusb(). */
   1139 void
   1140 uhci_remove_ls_ctrl(uhci_softc_t *sc, uhci_soft_qh_t *sqh)
   1141 {
   1142 	uhci_soft_qh_t *pqh;
   1143 
   1144 	SPLUSBCHECK;
   1145 
   1146 	DPRINTFN(10, ("uhci_remove_ls_ctrl: sqh=%p\n", sqh));
   1147 	/* See comment in uhci_remove_hs_ctrl() */
   1148 	if (!(sqh->qh.qh_elink & htole32(UHCI_PTR_T))) {
   1149 		sqh->qh.qh_elink = htole32(UHCI_PTR_T);
   1150 		delay(UHCI_QH_REMOVE_DELAY);
   1151 	}
   1152 	pqh = uhci_find_prev_qh(sc->sc_lctl_start, sqh);
   1153 	pqh->hlink = sqh->hlink;
   1154 	pqh->qh.qh_hlink = sqh->qh.qh_hlink;
   1155 	delay(UHCI_QH_REMOVE_DELAY);
   1156 	if (sc->sc_lctl_end == sqh)
   1157 		sc->sc_lctl_end = pqh;
   1158 }
   1159 
   1160 /* Add bulk QH, called at splusb(). */
   1161 void
   1162 uhci_add_bulk(uhci_softc_t *sc, uhci_soft_qh_t *sqh)
   1163 {
   1164 	uhci_soft_qh_t *eqh;
   1165 
   1166 	SPLUSBCHECK;
   1167 
   1168 	DPRINTFN(10, ("uhci_add_bulk: sqh=%p\n", sqh));
   1169 	eqh = sc->sc_bulk_end;
   1170 	sqh->hlink = eqh->hlink;
   1171 	sqh->qh.qh_hlink = eqh->qh.qh_hlink;
   1172 	eqh->hlink = sqh;
   1173 	eqh->qh.qh_hlink = htole32(sqh->physaddr | UHCI_PTR_QH);
   1174 	sc->sc_bulk_end = sqh;
   1175 	uhci_add_loop(sc);
   1176 }
   1177 
   1178 /* Remove bulk QH, called at splusb(). */
   1179 void
   1180 uhci_remove_bulk(uhci_softc_t *sc, uhci_soft_qh_t *sqh)
   1181 {
   1182 	uhci_soft_qh_t *pqh;
   1183 
   1184 	SPLUSBCHECK;
   1185 
   1186 	DPRINTFN(10, ("uhci_remove_bulk: sqh=%p\n", sqh));
   1187 	uhci_rem_loop(sc);
   1188 	/* See comment in uhci_remove_hs_ctrl() */
   1189 	if (!(sqh->qh.qh_elink & htole32(UHCI_PTR_T))) {
   1190 		sqh->qh.qh_elink = htole32(UHCI_PTR_T);
   1191 		delay(UHCI_QH_REMOVE_DELAY);
   1192 	}
   1193 	pqh = uhci_find_prev_qh(sc->sc_bulk_start, sqh);
   1194 	pqh->hlink       = sqh->hlink;
   1195 	pqh->qh.qh_hlink = sqh->qh.qh_hlink;
   1196 	delay(UHCI_QH_REMOVE_DELAY);
   1197 	if (sc->sc_bulk_end == sqh)
   1198 		sc->sc_bulk_end = pqh;
   1199 }
   1200 
   1201 Static int uhci_intr1(uhci_softc_t *);
   1202 
   1203 int
   1204 uhci_intr(void *arg)
   1205 {
   1206 	uhci_softc_t *sc = arg;
   1207 
   1208 	if (sc->sc_dying)
   1209 		return (0);
   1210 
   1211 	if (sc->sc_bus.use_polling) {
   1212 #ifdef DIAGNOSTIC
   1213 		DPRINTFN(16, ("uhci_intr: ignored interrupt while polling\n"));
   1214 #endif
   1215 		return (0);
   1216 	}
   1217 
   1218 	return (uhci_intr1(sc));
   1219 }
   1220 
   1221 int
   1222 uhci_intr1(uhci_softc_t *sc)
   1223 {
   1224 	int status;
   1225 	int ack;
   1226 
   1227 #ifdef UHCI_DEBUG
   1228 	if (uhcidebug > 15) {
   1229 		DPRINTF(("%s: uhci_intr1\n", USBDEVNAME(sc->sc_bus.bdev)));
   1230 		uhci_dumpregs(sc);
   1231 	}
   1232 #endif
   1233 
   1234 	status = UREAD2(sc, UHCI_STS) & UHCI_STS_ALLINTRS;
   1235 	if (status == 0)	/* The interrupt was not for us. */
   1236 		return (0);
   1237 
   1238 	if (sc->sc_suspend != PWR_RESUME) {
   1239 		printf("%s: interrupt while not operating ignored\n",
   1240 		       USBDEVNAME(sc->sc_bus.bdev));
   1241 		UWRITE2(sc, UHCI_STS, status); /* acknowledge the ints */
   1242 		return (0);
   1243 	}
   1244 
   1245 	ack = 0;
   1246 	if (status & UHCI_STS_USBINT)
   1247 		ack |= UHCI_STS_USBINT;
   1248 	if (status & UHCI_STS_USBEI)
   1249 		ack |= UHCI_STS_USBEI;
   1250 	if (status & UHCI_STS_RD) {
   1251 		ack |= UHCI_STS_RD;
   1252 #ifdef UHCI_DEBUG
   1253 		printf("%s: resume detect\n", USBDEVNAME(sc->sc_bus.bdev));
   1254 #endif
   1255 	}
   1256 	if (status & UHCI_STS_HSE) {
   1257 		ack |= UHCI_STS_HSE;
   1258 		printf("%s: host system error\n", USBDEVNAME(sc->sc_bus.bdev));
   1259 	}
   1260 	if (status & UHCI_STS_HCPE) {
   1261 		ack |= UHCI_STS_HCPE;
   1262 		printf("%s: host controller process error\n",
   1263 		       USBDEVNAME(sc->sc_bus.bdev));
   1264 	}
   1265 	if (status & UHCI_STS_HCH) {
   1266 		/* no acknowledge needed */
   1267 		if (!sc->sc_dying) {
   1268 			printf("%s: host controller halted\n",
   1269 			    USBDEVNAME(sc->sc_bus.bdev));
   1270 #ifdef UHCI_DEBUG
   1271 			uhci_dump_all(sc);
   1272 #endif
   1273 		}
   1274 		sc->sc_dying = 1;
   1275 	}
   1276 
   1277 	if (!ack)
   1278 		return (0);	/* nothing to acknowledge */
   1279 	UWRITE2(sc, UHCI_STS, ack); /* acknowledge the ints */
   1280 
   1281 	sc->sc_bus.no_intrs++;
   1282 	usb_schedsoftintr(&sc->sc_bus);
   1283 
   1284 	DPRINTFN(15, ("%s: uhci_intr: exit\n", USBDEVNAME(sc->sc_bus.bdev)));
   1285 
   1286 	return (1);
   1287 }
   1288 
   1289 void
   1290 uhci_softintr(void *v)
   1291 {
   1292 	uhci_softc_t *sc = v;
   1293 	uhci_intr_info_t *ii, *nextii;
   1294 
   1295 	DPRINTFN(10,("%s: uhci_softintr (%d)\n", USBDEVNAME(sc->sc_bus.bdev),
   1296 		     sc->sc_bus.intr_context));
   1297 
   1298 	sc->sc_bus.intr_context++;
   1299 
   1300 	/*
   1301 	 * Interrupts on UHCI really suck.  When the host controller
   1302 	 * interrupts because a transfer is completed there is no
   1303 	 * way of knowing which transfer it was.  You can scan down
   1304 	 * the TDs and QHs of the previous frame to limit the search,
   1305 	 * but that assumes that the interrupt was not delayed by more
   1306 	 * than 1 ms, which may not always be true (e.g. after debug
   1307 	 * output on a slow console).
   1308 	 * We scan all interrupt descriptors to see if any have
   1309 	 * completed.
   1310 	 */
   1311 	for (ii = LIST_FIRST(&sc->sc_intrhead); ii; ii = nextii) {
   1312 		nextii = LIST_NEXT(ii, list);
   1313 		uhci_check_intr(sc, ii);
   1314 	}
   1315 
   1316 #ifdef USB_USE_SOFTINTR
   1317 	if (sc->sc_softwake) {
   1318 		sc->sc_softwake = 0;
   1319 		wakeup(&sc->sc_softwake);
   1320 	}
   1321 #endif /* USB_USE_SOFTINTR */
   1322 
   1323 	sc->sc_bus.intr_context--;
   1324 }
   1325 
   1326 /* Check for an interrupt. */
   1327 void
   1328 uhci_check_intr(uhci_softc_t *sc, uhci_intr_info_t *ii)
   1329 {
   1330 	uhci_soft_td_t *std, *lstd;
   1331 	u_int32_t status;
   1332 
   1333 	DPRINTFN(15, ("uhci_check_intr: ii=%p\n", ii));
   1334 #ifdef DIAGNOSTIC
   1335 	if (ii == NULL) {
   1336 		printf("uhci_check_intr: no ii? %p\n", ii);
   1337 		return;
   1338 	}
   1339 #endif
   1340 	if (ii->xfer->status == USBD_CANCELLED ||
   1341 	    ii->xfer->status == USBD_TIMEOUT) {
   1342 		DPRINTF(("uhci_check_intr: aborted xfer=%p\n", ii->xfer));
   1343 		return;
   1344 	}
   1345 
   1346 	if (ii->stdstart == NULL)
   1347 		return;
   1348 	lstd = ii->stdend;
   1349 #ifdef DIAGNOSTIC
   1350 	if (lstd == NULL) {
   1351 		printf("uhci_check_intr: std==0\n");
   1352 		return;
   1353 	}
   1354 #endif
   1355 	/*
   1356 	 * If the last TD is still active we need to check whether there
   1357 	 * is an error somewhere in the middle, or whether there was a
   1358 	 * short packet (SPD and not ACTIVE).
   1359 	 */
   1360 	if (le32toh(lstd->td.td_status) & UHCI_TD_ACTIVE) {
   1361 		DPRINTFN(12, ("uhci_check_intr: active ii=%p\n", ii));
   1362 		for (std = ii->stdstart; std != lstd; std = std->link.std) {
   1363 			status = le32toh(std->td.td_status);
   1364 			/* If there's an active TD the xfer isn't done. */
   1365 			if (status & UHCI_TD_ACTIVE)
   1366 				break;
   1367 			/* Any kind of error makes the xfer done. */
   1368 			if (status & UHCI_TD_STALLED)
   1369 				goto done;
   1370 			/* We want short packets, and it is short: it's done */
   1371 			if ((status & UHCI_TD_SPD) &&
   1372 			      UHCI_TD_GET_ACTLEN(status) <
   1373 			      UHCI_TD_GET_MAXLEN(le32toh(std->td.td_token)))
   1374 				goto done;
   1375 		}
   1376 		DPRINTFN(12, ("uhci_check_intr: ii=%p std=%p still active\n",
   1377 			      ii, ii->stdstart));
   1378 		return;
   1379 	}
   1380  done:
   1381 	DPRINTFN(12, ("uhci_check_intr: ii=%p done\n", ii));
   1382 	usb_uncallout(ii->xfer->timeout_handle, uhci_timeout, ii);
   1383 	uhci_idone(ii);
   1384 }
   1385 
   1386 /* Called at splusb() */
   1387 void
   1388 uhci_idone(uhci_intr_info_t *ii)
   1389 {
   1390 	usbd_xfer_handle xfer = ii->xfer;
   1391 	struct uhci_pipe *upipe = (struct uhci_pipe *)xfer->pipe;
   1392 	uhci_soft_td_t *std;
   1393 	u_int32_t status = 0, nstatus;
   1394 	int actlen;
   1395 
   1396 	DPRINTFN(12, ("uhci_idone: ii=%p\n", ii));
   1397 #ifdef DIAGNOSTIC
   1398 	{
   1399 		int s = splhigh();
   1400 		if (ii->isdone) {
   1401 			splx(s);
   1402 #ifdef UHCI_DEBUG
   1403 			printf("uhci_idone: ii is done!\n   ");
   1404 			uhci_dump_ii(ii);
   1405 #else
   1406 			printf("uhci_idone: ii=%p is done!\n", ii);
   1407 #endif
   1408 			return;
   1409 		}
   1410 		ii->isdone = 1;
   1411 		splx(s);
   1412 	}
   1413 #endif
   1414 
   1415 	if (xfer->nframes != 0) {
   1416 		/* Isoc transfer, do things differently. */
   1417 		uhci_soft_td_t **stds = upipe->u.iso.stds;
   1418 		int i, n, nframes, len;
   1419 
   1420 		DPRINTFN(5,("uhci_idone: ii=%p isoc ready\n", ii));
   1421 
   1422 		nframes = xfer->nframes;
   1423 		actlen = 0;
   1424 		n = UXFER(xfer)->curframe;
   1425 		for (i = 0; i < nframes; i++) {
   1426 			std = stds[n];
   1427 #ifdef UHCI_DEBUG
   1428 			if (uhcidebug > 5) {
   1429 				DPRINTFN(-1,("uhci_idone: isoc TD %d\n", i));
   1430 				uhci_dump_td(std);
   1431 			}
   1432 #endif
   1433 			if (++n >= UHCI_VFRAMELIST_COUNT)
   1434 				n = 0;
   1435 			status = le32toh(std->td.td_status);
   1436 			len = UHCI_TD_GET_ACTLEN(status);
   1437 			xfer->frlengths[i] = len;
   1438 			actlen += len;
   1439 		}
   1440 		upipe->u.iso.inuse -= nframes;
   1441 		xfer->actlen = actlen;
   1442 		xfer->status = USBD_NORMAL_COMPLETION;
   1443 		goto end;
   1444 	}
   1445 
   1446 #ifdef UHCI_DEBUG
   1447 	DPRINTFN(10, ("uhci_idone: ii=%p, xfer=%p, pipe=%p ready\n",
   1448 		      ii, xfer, upipe));
   1449 	if (uhcidebug > 10)
   1450 		uhci_dump_tds(ii->stdstart);
   1451 #endif
   1452 
   1453 	/* The transfer is done, compute actual length and status. */
   1454 	actlen = 0;
   1455 	for (std = ii->stdstart; std != NULL; std = std->link.std) {
   1456 		nstatus = le32toh(std->td.td_status);
   1457 		if (nstatus & UHCI_TD_ACTIVE)
   1458 			break;
   1459 
   1460 		status = nstatus;
   1461 		if (UHCI_TD_GET_PID(le32toh(std->td.td_token)) !=
   1462 			UHCI_TD_PID_SETUP)
   1463 			actlen += UHCI_TD_GET_ACTLEN(status);
   1464 		else {
   1465 			/*
   1466 			 * UHCI will report CRCTO in addition to a STALL or NAK
   1467 			 * for a SETUP transaction.  See section 3.2.2, "TD
   1468 			 * CONTROL AND STATUS".
   1469 			 */
   1470 			if (status & (UHCI_TD_STALLED | UHCI_TD_NAK))
   1471 				status &= ~UHCI_TD_CRCTO;
   1472 		}
   1473 	}
   1474 	/* If there are left over TDs we need to update the toggle. */
   1475 	if (std != NULL)
   1476 		upipe->nexttoggle = UHCI_TD_GET_DT(le32toh(std->td.td_token));
   1477 
   1478 	status &= UHCI_TD_ERROR;
   1479 	DPRINTFN(10, ("uhci_idone: actlen=%d, status=0x%x\n",
   1480 		      actlen, status));
   1481 	xfer->actlen = actlen;
   1482 	if (status != 0) {
   1483 #ifdef UHCI_DEBUG
   1484 		char sbuf[128];
   1485 
   1486 		bitmask_snprintf((u_int32_t)status,
   1487 				 "\20\22BITSTUFF\23CRCTO\24NAK\25"
   1488 				 "BABBLE\26DBUFFER\27STALLED\30ACTIVE",
   1489 				 sbuf, sizeof(sbuf));
   1490 
   1491 		DPRINTFN((status == UHCI_TD_STALLED)*10,
   1492 			 ("uhci_idone: error, addr=%d, endpt=0x%02x, "
   1493 			  "status 0x%s\n",
   1494 			  xfer->pipe->device->address,
   1495 			  xfer->pipe->endpoint->edesc->bEndpointAddress,
   1496 			  sbuf));
   1497 #endif
   1498 
   1499 		if (status == UHCI_TD_STALLED)
   1500 			xfer->status = USBD_STALLED;
   1501 		else
   1502 			xfer->status = USBD_IOERROR; /* more info XXX */
   1503 	} else {
   1504 		xfer->status = USBD_NORMAL_COMPLETION;
   1505 	}
   1506 
   1507  end:
   1508 	usb_transfer_complete(xfer);
   1509 	DPRINTFN(12, ("uhci_idone: ii=%p done\n", ii));
   1510 }
   1511 
   1512 /*
   1513  * Called when a request does not complete.
   1514  */
   1515 void
   1516 uhci_timeout(void *addr)
   1517 {
   1518 	uhci_intr_info_t *ii = addr;
   1519 	struct uhci_xfer *uxfer = UXFER(ii->xfer);
   1520 	struct uhci_pipe *upipe = (struct uhci_pipe *)uxfer->xfer.pipe;
   1521 	uhci_softc_t *sc = (uhci_softc_t *)upipe->pipe.device->bus;
   1522 
   1523 	DPRINTF(("uhci_timeout: uxfer=%p\n", uxfer));
   1524 
   1525 	if (sc->sc_dying) {
   1526 		uhci_abort_xfer(&uxfer->xfer, USBD_TIMEOUT);
   1527 		return;
   1528 	}
   1529 
   1530 	/* Execute the abort in a process context. */
   1531 	usb_init_task(&uxfer->abort_task, uhci_timeout_task, ii->xfer);
   1532 	usb_add_task(uxfer->xfer.pipe->device, &uxfer->abort_task);
   1533 }
   1534 
   1535 void
   1536 uhci_timeout_task(void *addr)
   1537 {
   1538 	usbd_xfer_handle xfer = addr;
   1539 	int s;
   1540 
   1541 	DPRINTF(("uhci_timeout_task: xfer=%p\n", xfer));
   1542 
   1543 	s = splusb();
   1544 	uhci_abort_xfer(xfer, USBD_TIMEOUT);
   1545 	splx(s);
   1546 }
   1547 
   1548 /*
   1549  * Wait here until controller claims to have an interrupt.
   1550  * Then call uhci_intr and return.  Use timeout to avoid waiting
   1551  * too long.
   1552  * Only used during boot when interrupts are not enabled yet.
   1553  */
   1554 void
   1555 uhci_waitintr(uhci_softc_t *sc, usbd_xfer_handle xfer)
   1556 {
   1557 	int timo = xfer->timeout;
   1558 	uhci_intr_info_t *ii;
   1559 
   1560 	DPRINTFN(10,("uhci_waitintr: timeout = %dms\n", timo));
   1561 
   1562 	xfer->status = USBD_IN_PROGRESS;
   1563 	for (; timo >= 0; timo--) {
   1564 		usb_delay_ms(&sc->sc_bus, 1);
   1565 		DPRINTFN(20,("uhci_waitintr: 0x%04x\n", UREAD2(sc, UHCI_STS)));
   1566 		if (UREAD2(sc, UHCI_STS) & UHCI_STS_USBINT) {
   1567 			uhci_intr1(sc);
   1568 			if (xfer->status != USBD_IN_PROGRESS)
   1569 				return;
   1570 		}
   1571 	}
   1572 
   1573 	/* Timeout */
   1574 	DPRINTF(("uhci_waitintr: timeout\n"));
   1575 	for (ii = LIST_FIRST(&sc->sc_intrhead);
   1576 	     ii != NULL && ii->xfer != xfer;
   1577 	     ii = LIST_NEXT(ii, list))
   1578 		;
   1579 #ifdef DIAGNOSTIC
   1580 	if (ii == NULL)
   1581 		panic("uhci_waitintr: lost intr_info");
   1582 #endif
   1583 	uhci_idone(ii);
   1584 }
   1585 
   1586 void
   1587 uhci_poll(struct usbd_bus *bus)
   1588 {
   1589 	uhci_softc_t *sc = (uhci_softc_t *)bus;
   1590 
   1591 	if (UREAD2(sc, UHCI_STS) & UHCI_STS_USBINT)
   1592 		uhci_intr1(sc);
   1593 }
   1594 
   1595 void
   1596 uhci_reset(uhci_softc_t *sc)
   1597 {
   1598 	int n;
   1599 
   1600 	UHCICMD(sc, UHCI_CMD_HCRESET);
   1601 	/* The reset bit goes low when the controller is done. */
   1602 	for (n = 0; n < UHCI_RESET_TIMEOUT &&
   1603 		    (UREAD2(sc, UHCI_CMD) & UHCI_CMD_HCRESET); n++)
   1604 		usb_delay_ms(&sc->sc_bus, 1);
   1605 	if (n >= UHCI_RESET_TIMEOUT)
   1606 		printf("%s: controller did not reset\n",
   1607 		       USBDEVNAME(sc->sc_bus.bdev));
   1608 }
   1609 
   1610 usbd_status
   1611 uhci_run(uhci_softc_t *sc, int run)
   1612 {
   1613 	int s, n, running;
   1614 	u_int16_t cmd;
   1615 
   1616 	run = run != 0;
   1617 	s = splhardusb();
   1618 	DPRINTF(("uhci_run: setting run=%d\n", run));
   1619 	cmd = UREAD2(sc, UHCI_CMD);
   1620 	if (run)
   1621 		cmd |= UHCI_CMD_RS;
   1622 	else
   1623 		cmd &= ~UHCI_CMD_RS;
   1624 	UHCICMD(sc, cmd);
   1625 	for(n = 0; n < 10; n++) {
   1626 		running = !(UREAD2(sc, UHCI_STS) & UHCI_STS_HCH);
   1627 		/* return when we've entered the state we want */
   1628 		if (run == running) {
   1629 			splx(s);
   1630 			DPRINTF(("uhci_run: done cmd=0x%x sts=0x%x\n",
   1631 				 UREAD2(sc, UHCI_CMD), UREAD2(sc, UHCI_STS)));
   1632 			return (USBD_NORMAL_COMPLETION);
   1633 		}
   1634 		usb_delay_ms(&sc->sc_bus, 1);
   1635 	}
   1636 	splx(s);
   1637 	printf("%s: cannot %s\n", USBDEVNAME(sc->sc_bus.bdev),
   1638 	       run ? "start" : "stop");
   1639 	return (USBD_IOERROR);
   1640 }
   1641 
   1642 /*
   1643  * Memory management routines.
   1644  *  uhci_alloc_std allocates TDs
   1645  *  uhci_alloc_sqh allocates QHs
   1646  * These two routines do their own free list management,
   1647  * partly for speed, partly because allocating DMAable memory
   1648  * has page size granularaity so much memory would be wasted if
   1649  * only one TD/QH (32 bytes) was placed in each allocated chunk.
   1650  */
   1651 
   1652 uhci_soft_td_t *
   1653 uhci_alloc_std(uhci_softc_t *sc)
   1654 {
   1655 	uhci_soft_td_t *std;
   1656 	usbd_status err;
   1657 	int i, offs;
   1658 	usb_dma_t dma;
   1659 
   1660 	if (sc->sc_freetds == NULL) {
   1661 		DPRINTFN(2,("uhci_alloc_std: allocating chunk\n"));
   1662 		err = usb_allocmem(&sc->sc_bus, UHCI_STD_SIZE * UHCI_STD_CHUNK,
   1663 			  UHCI_TD_ALIGN, &dma);
   1664 		if (err)
   1665 			return (0);
   1666 		for(i = 0; i < UHCI_STD_CHUNK; i++) {
   1667 			offs = i * UHCI_STD_SIZE;
   1668 			std = KERNADDR(&dma, offs);
   1669 			std->physaddr = DMAADDR(&dma, offs);
   1670 			std->link.std = sc->sc_freetds;
   1671 			sc->sc_freetds = std;
   1672 		}
   1673 	}
   1674 	std = sc->sc_freetds;
   1675 	sc->sc_freetds = std->link.std;
   1676 	memset(&std->td, 0, sizeof(uhci_td_t));
   1677 	return std;
   1678 }
   1679 
   1680 void
   1681 uhci_free_std(uhci_softc_t *sc, uhci_soft_td_t *std)
   1682 {
   1683 #ifdef DIAGNOSTIC
   1684 #define TD_IS_FREE 0x12345678
   1685 	if (le32toh(std->td.td_token) == TD_IS_FREE) {
   1686 		printf("uhci_free_std: freeing free TD %p\n", std);
   1687 		return;
   1688 	}
   1689 	std->td.td_token = htole32(TD_IS_FREE);
   1690 #endif
   1691 	std->link.std = sc->sc_freetds;
   1692 	sc->sc_freetds = std;
   1693 }
   1694 
   1695 uhci_soft_qh_t *
   1696 uhci_alloc_sqh(uhci_softc_t *sc)
   1697 {
   1698 	uhci_soft_qh_t *sqh;
   1699 	usbd_status err;
   1700 	int i, offs;
   1701 	usb_dma_t dma;
   1702 
   1703 	if (sc->sc_freeqhs == NULL) {
   1704 		DPRINTFN(2, ("uhci_alloc_sqh: allocating chunk\n"));
   1705 		err = usb_allocmem(&sc->sc_bus, UHCI_SQH_SIZE * UHCI_SQH_CHUNK,
   1706 			  UHCI_QH_ALIGN, &dma);
   1707 		if (err)
   1708 			return (0);
   1709 		for(i = 0; i < UHCI_SQH_CHUNK; i++) {
   1710 			offs = i * UHCI_SQH_SIZE;
   1711 			sqh = KERNADDR(&dma, offs);
   1712 			sqh->physaddr = DMAADDR(&dma, offs);
   1713 			sqh->hlink = sc->sc_freeqhs;
   1714 			sc->sc_freeqhs = sqh;
   1715 		}
   1716 	}
   1717 	sqh = sc->sc_freeqhs;
   1718 	sc->sc_freeqhs = sqh->hlink;
   1719 	memset(&sqh->qh, 0, sizeof(uhci_qh_t));
   1720 	return (sqh);
   1721 }
   1722 
   1723 void
   1724 uhci_free_sqh(uhci_softc_t *sc, uhci_soft_qh_t *sqh)
   1725 {
   1726 	sqh->hlink = sc->sc_freeqhs;
   1727 	sc->sc_freeqhs = sqh;
   1728 }
   1729 
   1730 void
   1731 uhci_free_std_chain(uhci_softc_t *sc, uhci_soft_td_t *std,
   1732 		    uhci_soft_td_t *stdend)
   1733 {
   1734 	uhci_soft_td_t *p;
   1735 
   1736 	for (; std != stdend; std = p) {
   1737 		p = std->link.std;
   1738 		uhci_free_std(sc, std);
   1739 	}
   1740 }
   1741 
   1742 usbd_status
   1743 uhci_alloc_std_chain(struct uhci_pipe *upipe, uhci_softc_t *sc, int len,
   1744 		     int rd, u_int16_t flags, usb_dma_t *dma,
   1745 		     uhci_soft_td_t **sp, uhci_soft_td_t **ep)
   1746 {
   1747 	uhci_soft_td_t *p, *lastp;
   1748 	uhci_physaddr_t lastlink;
   1749 	int i, ntd, l, tog, maxp;
   1750 	u_int32_t status;
   1751 	int addr = upipe->pipe.device->address;
   1752 	int endpt = upipe->pipe.endpoint->edesc->bEndpointAddress;
   1753 
   1754 	DPRINTFN(8, ("uhci_alloc_std_chain: addr=%d endpt=%d len=%d speed=%d "
   1755 		      "flags=0x%x\n", addr, UE_GET_ADDR(endpt), len,
   1756 		      upipe->pipe.device->speed, flags));
   1757 	maxp = UGETW(upipe->pipe.endpoint->edesc->wMaxPacketSize);
   1758 	if (maxp == 0) {
   1759 		printf("uhci_alloc_std_chain: maxp=0\n");
   1760 		return (USBD_INVAL);
   1761 	}
   1762 	ntd = (len + maxp - 1) / maxp;
   1763 	if ((flags & USBD_FORCE_SHORT_XFER) && len % maxp == 0)
   1764 		ntd++;
   1765 	DPRINTFN(10, ("uhci_alloc_std_chain: maxp=%d ntd=%d\n", maxp, ntd));
   1766 	if (ntd == 0) {
   1767 		*sp = *ep = 0;
   1768 		DPRINTFN(-1,("uhci_alloc_std_chain: ntd=0\n"));
   1769 		return (USBD_NORMAL_COMPLETION);
   1770 	}
   1771 	tog = upipe->nexttoggle;
   1772 	if (ntd % 2 == 0)
   1773 		tog ^= 1;
   1774 	upipe->nexttoggle = tog ^ 1;
   1775 	lastp = NULL;
   1776 	lastlink = UHCI_PTR_T;
   1777 	ntd--;
   1778 	status = UHCI_TD_ZERO_ACTLEN(UHCI_TD_SET_ERRCNT(3) | UHCI_TD_ACTIVE);
   1779 	if (upipe->pipe.device->speed == USB_SPEED_LOW)
   1780 		status |= UHCI_TD_LS;
   1781 	if (flags & USBD_SHORT_XFER_OK)
   1782 		status |= UHCI_TD_SPD;
   1783 	for (i = ntd; i >= 0; i--) {
   1784 		p = uhci_alloc_std(sc);
   1785 		if (p == NULL) {
   1786 			uhci_free_std_chain(sc, lastp, NULL);
   1787 			return (USBD_NOMEM);
   1788 		}
   1789 		p->link.std = lastp;
   1790 		p->td.td_link = htole32(lastlink | UHCI_PTR_VF | UHCI_PTR_TD);
   1791 		lastp = p;
   1792 		lastlink = p->physaddr;
   1793 		p->td.td_status = htole32(status);
   1794 		if (i == ntd) {
   1795 			/* last TD */
   1796 			l = len % maxp;
   1797 			if (l == 0 && !(flags & USBD_FORCE_SHORT_XFER))
   1798 				l = maxp;
   1799 			*ep = p;
   1800 		} else
   1801 			l = maxp;
   1802 		p->td.td_token =
   1803 		    htole32(rd ? UHCI_TD_IN (l, endpt, addr, tog) :
   1804 				 UHCI_TD_OUT(l, endpt, addr, tog));
   1805 		p->td.td_buffer = htole32(DMAADDR(dma, i * maxp));
   1806 		tog ^= 1;
   1807 	}
   1808 	*sp = lastp;
   1809 	DPRINTFN(10, ("uhci_alloc_std_chain: nexttog=%d\n",
   1810 		      upipe->nexttoggle));
   1811 	return (USBD_NORMAL_COMPLETION);
   1812 }
   1813 
   1814 void
   1815 uhci_device_clear_toggle(usbd_pipe_handle pipe)
   1816 {
   1817 	struct uhci_pipe *upipe = (struct uhci_pipe *)pipe;
   1818 	upipe->nexttoggle = 0;
   1819 }
   1820 
   1821 void
   1822 uhci_noop(usbd_pipe_handle pipe)
   1823 {
   1824 }
   1825 
   1826 usbd_status
   1827 uhci_device_bulk_transfer(usbd_xfer_handle xfer)
   1828 {
   1829 	usbd_status err;
   1830 
   1831 	/* Insert last in queue. */
   1832 	err = usb_insert_transfer(xfer);
   1833 	if (err)
   1834 		return (err);
   1835 
   1836 	/*
   1837 	 * Pipe isn't running (otherwise err would be USBD_INPROG),
   1838 	 * so start it first.
   1839 	 */
   1840 	return (uhci_device_bulk_start(SIMPLEQ_FIRST(&xfer->pipe->queue)));
   1841 }
   1842 
   1843 usbd_status
   1844 uhci_device_bulk_start(usbd_xfer_handle xfer)
   1845 {
   1846 	struct uhci_pipe *upipe = (struct uhci_pipe *)xfer->pipe;
   1847 	usbd_device_handle dev = upipe->pipe.device;
   1848 	uhci_softc_t *sc = (uhci_softc_t *)dev->bus;
   1849 	uhci_intr_info_t *ii = &UXFER(xfer)->iinfo;
   1850 	uhci_soft_td_t *data, *dataend;
   1851 	uhci_soft_qh_t *sqh;
   1852 	usbd_status err;
   1853 	int len, isread, endpt;
   1854 	int s;
   1855 
   1856 	DPRINTFN(3, ("uhci_device_bulk_start: xfer=%p len=%d flags=%d ii=%p\n",
   1857 		     xfer, xfer->length, xfer->flags, ii));
   1858 
   1859 	if (sc->sc_dying)
   1860 		return (USBD_IOERROR);
   1861 
   1862 #ifdef DIAGNOSTIC
   1863 	if (xfer->rqflags & URQ_REQUEST)
   1864 		panic("uhci_device_bulk_transfer: a request");
   1865 #endif
   1866 
   1867 	len = xfer->length;
   1868 	endpt = upipe->pipe.endpoint->edesc->bEndpointAddress;
   1869 	isread = UE_GET_DIR(endpt) == UE_DIR_IN;
   1870 	sqh = upipe->u.bulk.sqh;
   1871 
   1872 	upipe->u.bulk.isread = isread;
   1873 	upipe->u.bulk.length = len;
   1874 
   1875 	err = uhci_alloc_std_chain(upipe, sc, len, isread, xfer->flags,
   1876 				   &xfer->dmabuf, &data, &dataend);
   1877 	if (err)
   1878 		return (err);
   1879 	dataend->td.td_status |= htole32(UHCI_TD_IOC);
   1880 
   1881 #ifdef UHCI_DEBUG
   1882 	if (uhcidebug > 8) {
   1883 		DPRINTF(("uhci_device_bulk_transfer: data(1)\n"));
   1884 		uhci_dump_tds(data);
   1885 	}
   1886 #endif
   1887 
   1888 	/* Set up interrupt info. */
   1889 	ii->xfer = xfer;
   1890 	ii->stdstart = data;
   1891 	ii->stdend = dataend;
   1892 #ifdef DIAGNOSTIC
   1893 	if (!ii->isdone) {
   1894 		printf("uhci_device_bulk_transfer: not done, ii=%p\n", ii);
   1895 	}
   1896 	ii->isdone = 0;
   1897 #endif
   1898 
   1899 	sqh->elink = data;
   1900 	sqh->qh.qh_elink = htole32(data->physaddr | UHCI_PTR_TD);
   1901 
   1902 	s = splusb();
   1903 	uhci_add_bulk(sc, sqh);
   1904 	uhci_add_intr_info(sc, ii);
   1905 
   1906 	if (xfer->timeout && !sc->sc_bus.use_polling) {
   1907 		usb_callout(xfer->timeout_handle, mstohz(xfer->timeout),
   1908 			    uhci_timeout, ii);
   1909 	}
   1910 	xfer->status = USBD_IN_PROGRESS;
   1911 	splx(s);
   1912 
   1913 #ifdef UHCI_DEBUG
   1914 	if (uhcidebug > 10) {
   1915 		DPRINTF(("uhci_device_bulk_transfer: data(2)\n"));
   1916 		uhci_dump_tds(data);
   1917 	}
   1918 #endif
   1919 
   1920 	if (sc->sc_bus.use_polling)
   1921 		uhci_waitintr(sc, xfer);
   1922 
   1923 	return (USBD_IN_PROGRESS);
   1924 }
   1925 
   1926 /* Abort a device bulk request. */
   1927 void
   1928 uhci_device_bulk_abort(usbd_xfer_handle xfer)
   1929 {
   1930 	DPRINTF(("uhci_device_bulk_abort:\n"));
   1931 	uhci_abort_xfer(xfer, USBD_CANCELLED);
   1932 }
   1933 
   1934 /*
   1935  * Abort a device request.
   1936  * If this routine is called at splusb() it guarantees that the request
   1937  * will be removed from the hardware scheduling and that the callback
   1938  * for it will be called with USBD_CANCELLED status.
   1939  * It's impossible to guarantee that the requested transfer will not
   1940  * have happened since the hardware runs concurrently.
   1941  * If the transaction has already happened we rely on the ordinary
   1942  * interrupt processing to process it.
   1943  */
   1944 void
   1945 uhci_abort_xfer(usbd_xfer_handle xfer, usbd_status status)
   1946 {
   1947 	uhci_intr_info_t *ii = &UXFER(xfer)->iinfo;
   1948 	struct uhci_pipe *upipe = (struct uhci_pipe *)xfer->pipe;
   1949 	uhci_softc_t *sc = (uhci_softc_t *)upipe->pipe.device->bus;
   1950 	uhci_soft_td_t *std;
   1951 	int s;
   1952 	int wake;
   1953 
   1954 	DPRINTFN(1,("uhci_abort_xfer: xfer=%p, status=%d\n", xfer, status));
   1955 
   1956 	if (sc->sc_dying) {
   1957 		/* If we're dying, just do the software part. */
   1958 		s = splusb();
   1959 		xfer->status = status;	/* make software ignore it */
   1960 		usb_uncallout(xfer->timeout_handle, uhci_timeout, xfer);
   1961 		usb_transfer_complete(xfer);
   1962 		splx(s);
   1963 	}
   1964 
   1965 	if (xfer->device->bus->intr_context || !curproc)
   1966 		panic("uhci_abort_xfer: not in process context");
   1967 
   1968 	/*
   1969 	 * If an abort is already in progress then just wait for it to
   1970 	 * complete and return.
   1971 	 */
   1972 	if (xfer->hcflags & UXFER_ABORTING) {
   1973 		DPRINTFN(2, ("uhci_abort_xfer: already aborting\n"));
   1974 #ifdef DIAGNOSTIC
   1975 		if (status == USBD_TIMEOUT)
   1976 			printf("uhci_abort_xfer: TIMEOUT while aborting\n");
   1977 #endif
   1978 		/* Override the status which might be USBD_TIMEOUT. */
   1979 		xfer->status = status;
   1980 		DPRINTFN(2, ("uhci_abort_xfer: waiting for abort to finish\n"));
   1981 		xfer->hcflags |= UXFER_ABORTWAIT;
   1982 		while (xfer->hcflags & UXFER_ABORTING)
   1983 			tsleep(&xfer->hcflags, PZERO, "uhciaw", 0);
   1984 		return;
   1985 	}
   1986 	xfer->hcflags |= UXFER_ABORTING;
   1987 
   1988 	/*
   1989 	 * Step 1: Make interrupt routine and hardware ignore xfer.
   1990 	 */
   1991 	s = splusb();
   1992 	xfer->status = status;	/* make software ignore it */
   1993 	usb_uncallout(xfer->timeout_handle, uhci_timeout, ii);
   1994 	DPRINTFN(1,("uhci_abort_xfer: stop ii=%p\n", ii));
   1995 	for (std = ii->stdstart; std != NULL; std = std->link.std)
   1996 		std->td.td_status &= htole32(~(UHCI_TD_ACTIVE | UHCI_TD_IOC));
   1997 	splx(s);
   1998 
   1999 	/*
   2000 	 * Step 2: Wait until we know hardware has finished any possible
   2001 	 * use of the xfer.  Also make sure the soft interrupt routine
   2002 	 * has run.
   2003 	 */
   2004 	usb_delay_ms(upipe->pipe.device->bus, 2); /* Hardware finishes in 1ms */
   2005 	s = splusb();
   2006 #ifdef USB_USE_SOFTINTR
   2007 	sc->sc_softwake = 1;
   2008 #endif /* USB_USE_SOFTINTR */
   2009 	usb_schedsoftintr(&sc->sc_bus);
   2010 #ifdef USB_USE_SOFTINTR
   2011 	DPRINTFN(1,("uhci_abort_xfer: tsleep\n"));
   2012 	tsleep(&sc->sc_softwake, PZERO, "uhciab", 0);
   2013 #endif /* USB_USE_SOFTINTR */
   2014 	splx(s);
   2015 
   2016 	/*
   2017 	 * Step 3: Execute callback.
   2018 	 */
   2019 	DPRINTFN(1,("uhci_abort_xfer: callback\n"));
   2020 	s = splusb();
   2021 #ifdef DIAGNOSTIC
   2022 	ii->isdone = 1;
   2023 #endif
   2024 	wake = xfer->hcflags & UXFER_ABORTWAIT;
   2025 	xfer->hcflags &= ~(UXFER_ABORTING | UXFER_ABORTWAIT);
   2026 	usb_transfer_complete(xfer);
   2027 	if (wake)
   2028 		wakeup(&xfer->hcflags);
   2029 	splx(s);
   2030 }
   2031 
   2032 /* Close a device bulk pipe. */
   2033 void
   2034 uhci_device_bulk_close(usbd_pipe_handle pipe)
   2035 {
   2036 	struct uhci_pipe *upipe = (struct uhci_pipe *)pipe;
   2037 	usbd_device_handle dev = upipe->pipe.device;
   2038 	uhci_softc_t *sc = (uhci_softc_t *)dev->bus;
   2039 
   2040 	uhci_free_sqh(sc, upipe->u.bulk.sqh);
   2041 }
   2042 
   2043 usbd_status
   2044 uhci_device_ctrl_transfer(usbd_xfer_handle xfer)
   2045 {
   2046 	usbd_status err;
   2047 
   2048 	/* Insert last in queue. */
   2049 	err = usb_insert_transfer(xfer);
   2050 	if (err)
   2051 		return (err);
   2052 
   2053 	/*
   2054 	 * Pipe isn't running (otherwise err would be USBD_INPROG),
   2055 	 * so start it first.
   2056 	 */
   2057 	return (uhci_device_ctrl_start(SIMPLEQ_FIRST(&xfer->pipe->queue)));
   2058 }
   2059 
   2060 usbd_status
   2061 uhci_device_ctrl_start(usbd_xfer_handle xfer)
   2062 {
   2063 	uhci_softc_t *sc = (uhci_softc_t *)xfer->pipe->device->bus;
   2064 	usbd_status err;
   2065 
   2066 	if (sc->sc_dying)
   2067 		return (USBD_IOERROR);
   2068 
   2069 #ifdef DIAGNOSTIC
   2070 	if (!(xfer->rqflags & URQ_REQUEST))
   2071 		panic("uhci_device_ctrl_transfer: not a request");
   2072 #endif
   2073 
   2074 	err = uhci_device_request(xfer);
   2075 	if (err)
   2076 		return (err);
   2077 
   2078 	if (sc->sc_bus.use_polling)
   2079 		uhci_waitintr(sc, xfer);
   2080 	return (USBD_IN_PROGRESS);
   2081 }
   2082 
   2083 usbd_status
   2084 uhci_device_intr_transfer(usbd_xfer_handle xfer)
   2085 {
   2086 	usbd_status err;
   2087 
   2088 	/* Insert last in queue. */
   2089 	err = usb_insert_transfer(xfer);
   2090 	if (err)
   2091 		return (err);
   2092 
   2093 	/*
   2094 	 * Pipe isn't running (otherwise err would be USBD_INPROG),
   2095 	 * so start it first.
   2096 	 */
   2097 	return (uhci_device_intr_start(SIMPLEQ_FIRST(&xfer->pipe->queue)));
   2098 }
   2099 
   2100 usbd_status
   2101 uhci_device_intr_start(usbd_xfer_handle xfer)
   2102 {
   2103 	struct uhci_pipe *upipe = (struct uhci_pipe *)xfer->pipe;
   2104 	usbd_device_handle dev = upipe->pipe.device;
   2105 	uhci_softc_t *sc = (uhci_softc_t *)dev->bus;
   2106 	uhci_intr_info_t *ii = &UXFER(xfer)->iinfo;
   2107 	uhci_soft_td_t *data, *dataend;
   2108 	uhci_soft_qh_t *sqh;
   2109 	usbd_status err;
   2110 	int isread, endpt;
   2111 	int i, s;
   2112 
   2113 	if (sc->sc_dying)
   2114 		return (USBD_IOERROR);
   2115 
   2116 	DPRINTFN(3,("uhci_device_intr_transfer: xfer=%p len=%d flags=%d\n",
   2117 		    xfer, xfer->length, xfer->flags));
   2118 
   2119 #ifdef DIAGNOSTIC
   2120 	if (xfer->rqflags & URQ_REQUEST)
   2121 		panic("uhci_device_intr_transfer: a request");
   2122 #endif
   2123 
   2124 	endpt = upipe->pipe.endpoint->edesc->bEndpointAddress;
   2125 	isread = UE_GET_DIR(endpt) == UE_DIR_IN;
   2126 
   2127 	upipe->u.intr.isread = isread;
   2128 
   2129 	err = uhci_alloc_std_chain(upipe, sc, xfer->length, isread,
   2130 				   xfer->flags, &xfer->dmabuf, &data,
   2131 				   &dataend);
   2132 	if (err)
   2133 		return (err);
   2134 	dataend->td.td_status |= htole32(UHCI_TD_IOC);
   2135 
   2136 #ifdef UHCI_DEBUG
   2137 	if (uhcidebug > 10) {
   2138 		DPRINTF(("uhci_device_intr_transfer: data(1)\n"));
   2139 		uhci_dump_tds(data);
   2140 		uhci_dump_qh(upipe->u.intr.qhs[0]);
   2141 	}
   2142 #endif
   2143 
   2144 	s = splusb();
   2145 	/* Set up interrupt info. */
   2146 	ii->xfer = xfer;
   2147 	ii->stdstart = data;
   2148 	ii->stdend = dataend;
   2149 #ifdef DIAGNOSTIC
   2150 	if (!ii->isdone) {
   2151 		printf("uhci_device_intr_transfer: not done, ii=%p\n", ii);
   2152 	}
   2153 	ii->isdone = 0;
   2154 #endif
   2155 
   2156 	DPRINTFN(10,("uhci_device_intr_transfer: qhs[0]=%p\n",
   2157 		     upipe->u.intr.qhs[0]));
   2158 	for (i = 0; i < upipe->u.intr.npoll; i++) {
   2159 		sqh = upipe->u.intr.qhs[i];
   2160 		sqh->elink = data;
   2161 		sqh->qh.qh_elink = htole32(data->physaddr | UHCI_PTR_TD);
   2162 	}
   2163 	uhci_add_intr_info(sc, ii);
   2164 	xfer->status = USBD_IN_PROGRESS;
   2165 	splx(s);
   2166 
   2167 #ifdef UHCI_DEBUG
   2168 	if (uhcidebug > 10) {
   2169 		DPRINTF(("uhci_device_intr_transfer: data(2)\n"));
   2170 		uhci_dump_tds(data);
   2171 		uhci_dump_qh(upipe->u.intr.qhs[0]);
   2172 	}
   2173 #endif
   2174 
   2175 	return (USBD_IN_PROGRESS);
   2176 }
   2177 
   2178 /* Abort a device control request. */
   2179 void
   2180 uhci_device_ctrl_abort(usbd_xfer_handle xfer)
   2181 {
   2182 	DPRINTF(("uhci_device_ctrl_abort:\n"));
   2183 	uhci_abort_xfer(xfer, USBD_CANCELLED);
   2184 }
   2185 
   2186 /* Close a device control pipe. */
   2187 void
   2188 uhci_device_ctrl_close(usbd_pipe_handle pipe)
   2189 {
   2190 }
   2191 
   2192 /* Abort a device interrupt request. */
   2193 void
   2194 uhci_device_intr_abort(usbd_xfer_handle xfer)
   2195 {
   2196 	DPRINTFN(1,("uhci_device_intr_abort: xfer=%p\n", xfer));
   2197 	if (xfer->pipe->intrxfer == xfer) {
   2198 		DPRINTFN(1,("uhci_device_intr_abort: remove\n"));
   2199 		xfer->pipe->intrxfer = NULL;
   2200 	}
   2201 	uhci_abort_xfer(xfer, USBD_CANCELLED);
   2202 }
   2203 
   2204 /* Close a device interrupt pipe. */
   2205 void
   2206 uhci_device_intr_close(usbd_pipe_handle pipe)
   2207 {
   2208 	struct uhci_pipe *upipe = (struct uhci_pipe *)pipe;
   2209 	uhci_softc_t *sc = (uhci_softc_t *)pipe->device->bus;
   2210 	int i, npoll;
   2211 	int s;
   2212 
   2213 	/* Unlink descriptors from controller data structures. */
   2214 	npoll = upipe->u.intr.npoll;
   2215 	s = splusb();
   2216 	for (i = 0; i < npoll; i++)
   2217 		uhci_remove_intr(sc, upipe->u.intr.qhs[i]);
   2218 	splx(s);
   2219 
   2220 	/*
   2221 	 * We now have to wait for any activity on the physical
   2222 	 * descriptors to stop.
   2223 	 */
   2224 	usb_delay_ms(&sc->sc_bus, 2);
   2225 
   2226 	for(i = 0; i < npoll; i++)
   2227 		uhci_free_sqh(sc, upipe->u.intr.qhs[i]);
   2228 	free(upipe->u.intr.qhs, M_USBHC);
   2229 
   2230 	/* XXX free other resources */
   2231 }
   2232 
   2233 usbd_status
   2234 uhci_device_request(usbd_xfer_handle xfer)
   2235 {
   2236 	struct uhci_pipe *upipe = (struct uhci_pipe *)xfer->pipe;
   2237 	usb_device_request_t *req = &xfer->request;
   2238 	usbd_device_handle dev = upipe->pipe.device;
   2239 	uhci_softc_t *sc = (uhci_softc_t *)dev->bus;
   2240 	int addr = dev->address;
   2241 	int endpt = upipe->pipe.endpoint->edesc->bEndpointAddress;
   2242 	uhci_intr_info_t *ii = &UXFER(xfer)->iinfo;
   2243 	uhci_soft_td_t *setup, *data, *stat, *next, *dataend;
   2244 	uhci_soft_qh_t *sqh;
   2245 	int len;
   2246 	u_int32_t ls;
   2247 	usbd_status err;
   2248 	int isread;
   2249 	int s;
   2250 
   2251 	DPRINTFN(3,("uhci_device_control type=0x%02x, request=0x%02x, "
   2252 		    "wValue=0x%04x, wIndex=0x%04x len=%d, addr=%d, endpt=%d\n",
   2253 		    req->bmRequestType, req->bRequest, UGETW(req->wValue),
   2254 		    UGETW(req->wIndex), UGETW(req->wLength),
   2255 		    addr, endpt));
   2256 
   2257 	ls = dev->speed == USB_SPEED_LOW ? UHCI_TD_LS : 0;
   2258 	isread = req->bmRequestType & UT_READ;
   2259 	len = UGETW(req->wLength);
   2260 
   2261 	setup = upipe->u.ctl.setup;
   2262 	stat = upipe->u.ctl.stat;
   2263 	sqh = upipe->u.ctl.sqh;
   2264 
   2265 	/* Set up data transaction */
   2266 	if (len != 0) {
   2267 		upipe->nexttoggle = 1;
   2268 		err = uhci_alloc_std_chain(upipe, sc, len, isread, xfer->flags,
   2269 					   &xfer->dmabuf, &data, &dataend);
   2270 		if (err)
   2271 			return (err);
   2272 		next = data;
   2273 		dataend->link.std = stat;
   2274 		dataend->td.td_link = htole32(stat->physaddr | UHCI_PTR_VF | UHCI_PTR_TD);
   2275 	} else {
   2276 		next = stat;
   2277 	}
   2278 	upipe->u.ctl.length = len;
   2279 
   2280 	memcpy(KERNADDR(&upipe->u.ctl.reqdma, 0), req, sizeof *req);
   2281 
   2282 	setup->link.std = next;
   2283 	setup->td.td_link = htole32(next->physaddr | UHCI_PTR_VF | UHCI_PTR_TD);
   2284 	setup->td.td_status = htole32(UHCI_TD_SET_ERRCNT(3) | ls |
   2285 		UHCI_TD_ACTIVE);
   2286 	setup->td.td_token = htole32(UHCI_TD_SETUP(sizeof *req, endpt, addr));
   2287 	setup->td.td_buffer = htole32(DMAADDR(&upipe->u.ctl.reqdma, 0));
   2288 
   2289 	stat->link.std = NULL;
   2290 	stat->td.td_link = htole32(UHCI_PTR_T);
   2291 	stat->td.td_status = htole32(UHCI_TD_SET_ERRCNT(3) | ls |
   2292 		UHCI_TD_ACTIVE | UHCI_TD_IOC);
   2293 	stat->td.td_token =
   2294 		htole32(isread ? UHCI_TD_OUT(0, endpt, addr, 1) :
   2295 		                 UHCI_TD_IN (0, endpt, addr, 1));
   2296 	stat->td.td_buffer = htole32(0);
   2297 
   2298 #ifdef UHCI_DEBUG
   2299 	if (uhcidebug > 10) {
   2300 		DPRINTF(("uhci_device_request: before transfer\n"));
   2301 		uhci_dump_tds(setup);
   2302 	}
   2303 #endif
   2304 
   2305 	/* Set up interrupt info. */
   2306 	ii->xfer = xfer;
   2307 	ii->stdstart = setup;
   2308 	ii->stdend = stat;
   2309 #ifdef DIAGNOSTIC
   2310 	if (!ii->isdone) {
   2311 		printf("uhci_device_request: not done, ii=%p\n", ii);
   2312 	}
   2313 	ii->isdone = 0;
   2314 #endif
   2315 
   2316 	sqh->elink = setup;
   2317 	sqh->qh.qh_elink = htole32(setup->physaddr | UHCI_PTR_TD);
   2318 
   2319 	s = splusb();
   2320 	if (dev->speed == USB_SPEED_LOW)
   2321 		uhci_add_ls_ctrl(sc, sqh);
   2322 	else
   2323 		uhci_add_hs_ctrl(sc, sqh);
   2324 	uhci_add_intr_info(sc, ii);
   2325 #ifdef UHCI_DEBUG
   2326 	if (uhcidebug > 12) {
   2327 		uhci_soft_td_t *std;
   2328 		uhci_soft_qh_t *xqh;
   2329 		uhci_soft_qh_t *sxqh;
   2330 		int maxqh = 0;
   2331 		uhci_physaddr_t link;
   2332 		DPRINTF(("uhci_enter_ctl_q: follow from [0]\n"));
   2333 		for (std = sc->sc_vframes[0].htd, link = 0;
   2334 		     (link & UHCI_PTR_QH) == 0;
   2335 		     std = std->link.std) {
   2336 			link = le32toh(std->td.td_link);
   2337 			uhci_dump_td(std);
   2338 		}
   2339 		sxqh = (uhci_soft_qh_t *)std;
   2340 		uhci_dump_qh(sxqh);
   2341 		for (xqh = sxqh;
   2342 		     xqh != NULL;
   2343 		     xqh = (maxqh++ == 5 || xqh->hlink == sxqh ||
   2344                             xqh->hlink == xqh ? NULL : xqh->hlink)) {
   2345 			uhci_dump_qh(xqh);
   2346 		}
   2347 		DPRINTF(("Enqueued QH:\n"));
   2348 		uhci_dump_qh(sqh);
   2349 		uhci_dump_tds(sqh->elink);
   2350 	}
   2351 #endif
   2352 	if (xfer->timeout && !sc->sc_bus.use_polling) {
   2353 		usb_callout(xfer->timeout_handle, mstohz(xfer->timeout),
   2354 			    uhci_timeout, ii);
   2355 	}
   2356 	xfer->status = USBD_IN_PROGRESS;
   2357 	splx(s);
   2358 
   2359 	return (USBD_NORMAL_COMPLETION);
   2360 }
   2361 
   2362 usbd_status
   2363 uhci_device_isoc_transfer(usbd_xfer_handle xfer)
   2364 {
   2365 	usbd_status err;
   2366 
   2367 	DPRINTFN(5,("uhci_device_isoc_transfer: xfer=%p\n", xfer));
   2368 
   2369 	/* Put it on our queue, */
   2370 	err = usb_insert_transfer(xfer);
   2371 
   2372 	/* bail out on error, */
   2373 	if (err && err != USBD_IN_PROGRESS)
   2374 		return (err);
   2375 
   2376 	/* XXX should check inuse here */
   2377 
   2378 	/* insert into schedule, */
   2379 	uhci_device_isoc_enter(xfer);
   2380 
   2381 	/* and start if the pipe wasn't running */
   2382 	if (!err)
   2383 		uhci_device_isoc_start(SIMPLEQ_FIRST(&xfer->pipe->queue));
   2384 
   2385 	return (err);
   2386 }
   2387 
   2388 void
   2389 uhci_device_isoc_enter(usbd_xfer_handle xfer)
   2390 {
   2391 	struct uhci_pipe *upipe = (struct uhci_pipe *)xfer->pipe;
   2392 	usbd_device_handle dev = upipe->pipe.device;
   2393 	uhci_softc_t *sc = (uhci_softc_t *)dev->bus;
   2394 	struct iso *iso = &upipe->u.iso;
   2395 	uhci_soft_td_t *std;
   2396 	u_int32_t buf, len, status;
   2397 	int s, i, next, nframes;
   2398 
   2399 	DPRINTFN(5,("uhci_device_isoc_enter: used=%d next=%d xfer=%p "
   2400 		    "nframes=%d\n",
   2401 		    iso->inuse, iso->next, xfer, xfer->nframes));
   2402 
   2403 	if (sc->sc_dying)
   2404 		return;
   2405 
   2406 	if (xfer->status == USBD_IN_PROGRESS) {
   2407 		/* This request has already been entered into the frame list */
   2408 		printf("uhci_device_isoc_enter: xfer=%p in frame list\n", xfer);
   2409 		/* XXX */
   2410 	}
   2411 
   2412 #ifdef DIAGNOSTIC
   2413 	if (iso->inuse >= UHCI_VFRAMELIST_COUNT)
   2414 		printf("uhci_device_isoc_enter: overflow!\n");
   2415 #endif
   2416 
   2417 	next = iso->next;
   2418 	if (next == -1) {
   2419 		/* Not in use yet, schedule it a few frames ahead. */
   2420 		next = (UREAD2(sc, UHCI_FRNUM) + 3) % UHCI_VFRAMELIST_COUNT;
   2421 		DPRINTFN(2,("uhci_device_isoc_enter: start next=%d\n", next));
   2422 	}
   2423 
   2424 	xfer->status = USBD_IN_PROGRESS;
   2425 	UXFER(xfer)->curframe = next;
   2426 
   2427 	buf = DMAADDR(&xfer->dmabuf, 0);
   2428 	status = UHCI_TD_ZERO_ACTLEN(UHCI_TD_SET_ERRCNT(0) |
   2429 				     UHCI_TD_ACTIVE |
   2430 				     UHCI_TD_IOS);
   2431 	nframes = xfer->nframes;
   2432 	s = splusb();
   2433 	for (i = 0; i < nframes; i++) {
   2434 		std = iso->stds[next];
   2435 		if (++next >= UHCI_VFRAMELIST_COUNT)
   2436 			next = 0;
   2437 		len = xfer->frlengths[i];
   2438 		std->td.td_buffer = htole32(buf);
   2439 		if (i == nframes - 1)
   2440 			status |= UHCI_TD_IOC;
   2441 		std->td.td_status = htole32(status);
   2442 		std->td.td_token &= htole32(~UHCI_TD_MAXLEN_MASK);
   2443 		std->td.td_token |= htole32(UHCI_TD_SET_MAXLEN(len));
   2444 #ifdef UHCI_DEBUG
   2445 		if (uhcidebug > 5) {
   2446 			DPRINTFN(5,("uhci_device_isoc_enter: TD %d\n", i));
   2447 			uhci_dump_td(std);
   2448 		}
   2449 #endif
   2450 		buf += len;
   2451 	}
   2452 	iso->next = next;
   2453 	iso->inuse += xfer->nframes;
   2454 
   2455 	splx(s);
   2456 }
   2457 
   2458 usbd_status
   2459 uhci_device_isoc_start(usbd_xfer_handle xfer)
   2460 {
   2461 	struct uhci_pipe *upipe = (struct uhci_pipe *)xfer->pipe;
   2462 	uhci_softc_t *sc = (uhci_softc_t *)upipe->pipe.device->bus;
   2463 	uhci_intr_info_t *ii = &UXFER(xfer)->iinfo;
   2464 	uhci_soft_td_t *end;
   2465 	int s, i;
   2466 
   2467 	DPRINTFN(5,("uhci_device_isoc_start: xfer=%p\n", xfer));
   2468 
   2469 	if (sc->sc_dying)
   2470 		return (USBD_IOERROR);
   2471 
   2472 #ifdef DIAGNOSTIC
   2473 	if (xfer->status != USBD_IN_PROGRESS)
   2474 		printf("uhci_device_isoc_start: not in progress %p\n", xfer);
   2475 #endif
   2476 
   2477 	/* Find the last TD */
   2478 	i = UXFER(xfer)->curframe + xfer->nframes;
   2479 	if (i >= UHCI_VFRAMELIST_COUNT)
   2480 		i -= UHCI_VFRAMELIST_COUNT;
   2481 	end = upipe->u.iso.stds[i];
   2482 
   2483 #ifdef DIAGNOSTIC
   2484 	if (end == NULL) {
   2485 		printf("uhci_device_isoc_start: end == NULL\n");
   2486 		return (USBD_INVAL);
   2487 	}
   2488 #endif
   2489 
   2490 	s = splusb();
   2491 
   2492 	/* Set up interrupt info. */
   2493 	ii->xfer = xfer;
   2494 	ii->stdstart = end;
   2495 	ii->stdend = end;
   2496 #ifdef DIAGNOSTIC
   2497 	if (!ii->isdone)
   2498 		printf("uhci_device_isoc_start: not done, ii=%p\n", ii);
   2499 	ii->isdone = 0;
   2500 #endif
   2501 	uhci_add_intr_info(sc, ii);
   2502 
   2503 	splx(s);
   2504 
   2505 	return (USBD_IN_PROGRESS);
   2506 }
   2507 
   2508 void
   2509 uhci_device_isoc_abort(usbd_xfer_handle xfer)
   2510 {
   2511 	struct uhci_pipe *upipe = (struct uhci_pipe *)xfer->pipe;
   2512 	uhci_soft_td_t **stds = upipe->u.iso.stds;
   2513 	uhci_soft_td_t *std;
   2514 	int i, n, s, nframes, maxlen, len;
   2515 
   2516 	s = splusb();
   2517 
   2518 	/* Transfer is already done. */
   2519 	if (xfer->status != USBD_NOT_STARTED &&
   2520 	    xfer->status != USBD_IN_PROGRESS) {
   2521 		splx(s);
   2522 		return;
   2523 	}
   2524 
   2525 	/* Give xfer the requested abort code. */
   2526 	xfer->status = USBD_CANCELLED;
   2527 
   2528 	/* make hardware ignore it, */
   2529 	nframes = xfer->nframes;
   2530 	n = UXFER(xfer)->curframe;
   2531 	maxlen = 0;
   2532 	for (i = 0; i < nframes; i++) {
   2533 		std = stds[n];
   2534 		std->td.td_status &= htole32(~(UHCI_TD_ACTIVE | UHCI_TD_IOC));
   2535 		len = UHCI_TD_GET_MAXLEN(le32toh(std->td.td_token));
   2536 		if (len > maxlen)
   2537 			maxlen = len;
   2538 		if (++n >= UHCI_VFRAMELIST_COUNT)
   2539 			n = 0;
   2540 	}
   2541 
   2542 	/* and wait until we are sure the hardware has finished. */
   2543 	delay(maxlen);
   2544 
   2545 #ifdef DIAGNOSTIC
   2546 	UXFER(xfer)->iinfo.isdone = 1;
   2547 #endif
   2548 	/* Run callback and remove from interrupt list. */
   2549 	usb_transfer_complete(xfer);
   2550 
   2551 	splx(s);
   2552 }
   2553 
   2554 void
   2555 uhci_device_isoc_close(usbd_pipe_handle pipe)
   2556 {
   2557 	struct uhci_pipe *upipe = (struct uhci_pipe *)pipe;
   2558 	usbd_device_handle dev = upipe->pipe.device;
   2559 	uhci_softc_t *sc = (uhci_softc_t *)dev->bus;
   2560 	uhci_soft_td_t *std, *vstd;
   2561 	struct iso *iso;
   2562 	int i, s;
   2563 
   2564 	/*
   2565 	 * Make sure all TDs are marked as inactive.
   2566 	 * Wait for completion.
   2567 	 * Unschedule.
   2568 	 * Deallocate.
   2569 	 */
   2570 	iso = &upipe->u.iso;
   2571 
   2572 	for (i = 0; i < UHCI_VFRAMELIST_COUNT; i++)
   2573 		iso->stds[i]->td.td_status &= htole32(~UHCI_TD_ACTIVE);
   2574 	usb_delay_ms(&sc->sc_bus, 2); /* wait for completion */
   2575 
   2576 	s = splusb();
   2577 	for (i = 0; i < UHCI_VFRAMELIST_COUNT; i++) {
   2578 		std = iso->stds[i];
   2579 		for (vstd = sc->sc_vframes[i].htd;
   2580 		     vstd != NULL && vstd->link.std != std;
   2581 		     vstd = vstd->link.std)
   2582 			;
   2583 		if (vstd == NULL) {
   2584 			/*panic*/
   2585 			printf("uhci_device_isoc_close: %p not found\n", std);
   2586 			splx(s);
   2587 			return;
   2588 		}
   2589 		vstd->link = std->link;
   2590 		vstd->td.td_link = std->td.td_link;
   2591 		uhci_free_std(sc, std);
   2592 	}
   2593 	splx(s);
   2594 
   2595 	free(iso->stds, M_USBHC);
   2596 }
   2597 
   2598 usbd_status
   2599 uhci_setup_isoc(usbd_pipe_handle pipe)
   2600 {
   2601 	struct uhci_pipe *upipe = (struct uhci_pipe *)pipe;
   2602 	usbd_device_handle dev = upipe->pipe.device;
   2603 	uhci_softc_t *sc = (uhci_softc_t *)dev->bus;
   2604 	int addr = upipe->pipe.device->address;
   2605 	int endpt = upipe->pipe.endpoint->edesc->bEndpointAddress;
   2606 	int rd = UE_GET_DIR(endpt) == UE_DIR_IN;
   2607 	uhci_soft_td_t *std, *vstd;
   2608 	u_int32_t token;
   2609 	struct iso *iso;
   2610 	int i, s;
   2611 
   2612 	iso = &upipe->u.iso;
   2613 	iso->stds = malloc(UHCI_VFRAMELIST_COUNT * sizeof (uhci_soft_td_t *),
   2614 			   M_USBHC, M_WAITOK);
   2615 
   2616 	token = rd ? UHCI_TD_IN (0, endpt, addr, 0) :
   2617 		     UHCI_TD_OUT(0, endpt, addr, 0);
   2618 
   2619 	/* Allocate the TDs and mark as inactive; */
   2620 	for (i = 0; i < UHCI_VFRAMELIST_COUNT; i++) {
   2621 		std = uhci_alloc_std(sc);
   2622 		if (std == 0)
   2623 			goto bad;
   2624 		std->td.td_status = htole32(UHCI_TD_IOS); /* iso, inactive */
   2625 		std->td.td_token = htole32(token);
   2626 		iso->stds[i] = std;
   2627 	}
   2628 
   2629 	/* Insert TDs into schedule. */
   2630 	s = splusb();
   2631 	for (i = 0; i < UHCI_VFRAMELIST_COUNT; i++) {
   2632 		std = iso->stds[i];
   2633 		vstd = sc->sc_vframes[i].htd;
   2634 		std->link = vstd->link;
   2635 		std->td.td_link = vstd->td.td_link;
   2636 		vstd->link.std = std;
   2637 		vstd->td.td_link = htole32(std->physaddr | UHCI_PTR_TD);
   2638 	}
   2639 	splx(s);
   2640 
   2641 	iso->next = -1;
   2642 	iso->inuse = 0;
   2643 
   2644 	return (USBD_NORMAL_COMPLETION);
   2645 
   2646  bad:
   2647 	while (--i >= 0)
   2648 		uhci_free_std(sc, iso->stds[i]);
   2649 	free(iso->stds, M_USBHC);
   2650 	return (USBD_NOMEM);
   2651 }
   2652 
   2653 void
   2654 uhci_device_isoc_done(usbd_xfer_handle xfer)
   2655 {
   2656 	uhci_intr_info_t *ii = &UXFER(xfer)->iinfo;
   2657 
   2658 	DPRINTFN(4, ("uhci_isoc_done: length=%d\n", xfer->actlen));
   2659 
   2660 	if (ii->xfer != xfer)
   2661 		/* Not on interrupt list, ignore it. */
   2662 		return;
   2663 
   2664 	if (!uhci_active_intr_info(ii))
   2665 		return;
   2666 
   2667 #ifdef DIAGNOSTIC
   2668 	if (xfer->busy_free != XFER_BUSY) {
   2669 		printf("uhci_device_isoc_done: xfer=%p not busy 0x%08x\n",
   2670 		       xfer, xfer->busy_free);
   2671 		return;
   2672 	}
   2673 
   2674         if (ii->stdend == NULL) {
   2675                 printf("uhci_device_isoc_done: xfer=%p stdend==NULL\n", xfer);
   2676 #ifdef UHCI_DEBUG
   2677 		uhci_dump_ii(ii);
   2678 #endif
   2679 		return;
   2680 	}
   2681 #endif
   2682 
   2683 	/* Turn off the interrupt since it is active even if the TD is not. */
   2684 	ii->stdend->td.td_status &= htole32(~UHCI_TD_IOC);
   2685 
   2686 	uhci_del_intr_info(ii);	/* remove from active list */
   2687 }
   2688 
   2689 void
   2690 uhci_device_intr_done(usbd_xfer_handle xfer)
   2691 {
   2692 	uhci_intr_info_t *ii = &UXFER(xfer)->iinfo;
   2693 	uhci_softc_t *sc = ii->sc;
   2694 	struct uhci_pipe *upipe = (struct uhci_pipe *)xfer->pipe;
   2695 	uhci_soft_qh_t *sqh;
   2696 	int i, npoll;
   2697 
   2698 	DPRINTFN(5, ("uhci_device_intr_done: length=%d\n", xfer->actlen));
   2699 
   2700 	npoll = upipe->u.intr.npoll;
   2701 	for(i = 0; i < npoll; i++) {
   2702 		sqh = upipe->u.intr.qhs[i];
   2703 		sqh->elink = NULL;
   2704 		sqh->qh.qh_elink = htole32(UHCI_PTR_T);
   2705 	}
   2706 	uhci_free_std_chain(sc, ii->stdstart, NULL);
   2707 
   2708 	/* XXX Wasteful. */
   2709 	if (xfer->pipe->repeat) {
   2710 		uhci_soft_td_t *data, *dataend;
   2711 
   2712 		DPRINTFN(5,("uhci_device_intr_done: requeing\n"));
   2713 
   2714 		/* This alloc cannot fail since we freed the chain above. */
   2715 		uhci_alloc_std_chain(upipe, sc, xfer->length, 1, xfer->flags,
   2716 				     &xfer->dmabuf, &data, &dataend);
   2717 		dataend->td.td_status |= htole32(UHCI_TD_IOC);
   2718 
   2719 #ifdef UHCI_DEBUG
   2720 		if (uhcidebug > 10) {
   2721 			DPRINTF(("uhci_device_intr_done: data(1)\n"));
   2722 			uhci_dump_tds(data);
   2723 			uhci_dump_qh(upipe->u.intr.qhs[0]);
   2724 		}
   2725 #endif
   2726 
   2727 		ii->stdstart = data;
   2728 		ii->stdend = dataend;
   2729 #ifdef DIAGNOSTIC
   2730 		if (!ii->isdone) {
   2731 			printf("uhci_device_intr_done: not done, ii=%p\n", ii);
   2732 		}
   2733 		ii->isdone = 0;
   2734 #endif
   2735 		for (i = 0; i < npoll; i++) {
   2736 			sqh = upipe->u.intr.qhs[i];
   2737 			sqh->elink = data;
   2738 			sqh->qh.qh_elink = htole32(data->physaddr | UHCI_PTR_TD);
   2739 		}
   2740 		xfer->status = USBD_IN_PROGRESS;
   2741 		/* The ii is already on the examined list, just leave it. */
   2742 	} else {
   2743 		DPRINTFN(5,("uhci_device_intr_done: removing\n"));
   2744 		if (uhci_active_intr_info(ii))
   2745 			uhci_del_intr_info(ii);
   2746 	}
   2747 }
   2748 
   2749 /* Deallocate request data structures */
   2750 void
   2751 uhci_device_ctrl_done(usbd_xfer_handle xfer)
   2752 {
   2753 	uhci_intr_info_t *ii = &UXFER(xfer)->iinfo;
   2754 	uhci_softc_t *sc = ii->sc;
   2755 	struct uhci_pipe *upipe = (struct uhci_pipe *)xfer->pipe;
   2756 
   2757 #ifdef DIAGNOSTIC
   2758 	if (!(xfer->rqflags & URQ_REQUEST))
   2759 		panic("uhci_device_ctrl_done: not a request");
   2760 #endif
   2761 
   2762 	if (!uhci_active_intr_info(ii))
   2763 		return;
   2764 
   2765 	uhci_del_intr_info(ii);	/* remove from active list */
   2766 
   2767 	if (upipe->pipe.device->speed == USB_SPEED_LOW)
   2768 		uhci_remove_ls_ctrl(sc, upipe->u.ctl.sqh);
   2769 	else
   2770 		uhci_remove_hs_ctrl(sc, upipe->u.ctl.sqh);
   2771 
   2772 	if (upipe->u.ctl.length != 0)
   2773 		uhci_free_std_chain(sc, ii->stdstart->link.std, ii->stdend);
   2774 
   2775 	DPRINTFN(5, ("uhci_device_ctrl_done: length=%d\n", xfer->actlen));
   2776 }
   2777 
   2778 /* Deallocate request data structures */
   2779 void
   2780 uhci_device_bulk_done(usbd_xfer_handle xfer)
   2781 {
   2782 	uhci_intr_info_t *ii = &UXFER(xfer)->iinfo;
   2783 	uhci_softc_t *sc = ii->sc;
   2784 	struct uhci_pipe *upipe = (struct uhci_pipe *)xfer->pipe;
   2785 
   2786 	DPRINTFN(5,("uhci_device_bulk_done: xfer=%p ii=%p sc=%p upipe=%p\n",
   2787 		    xfer, ii, sc, upipe));
   2788 
   2789 	if (!uhci_active_intr_info(ii))
   2790 		return;
   2791 
   2792 	uhci_del_intr_info(ii);	/* remove from active list */
   2793 
   2794 	uhci_remove_bulk(sc, upipe->u.bulk.sqh);
   2795 
   2796 	uhci_free_std_chain(sc, ii->stdstart, NULL);
   2797 
   2798 	DPRINTFN(5, ("uhci_device_bulk_done: length=%d\n", xfer->actlen));
   2799 }
   2800 
   2801 /* Add interrupt QH, called with vflock. */
   2802 void
   2803 uhci_add_intr(uhci_softc_t *sc, uhci_soft_qh_t *sqh)
   2804 {
   2805 	struct uhci_vframe *vf = &sc->sc_vframes[sqh->pos];
   2806 	uhci_soft_qh_t *eqh;
   2807 
   2808 	DPRINTFN(4, ("uhci_add_intr: n=%d sqh=%p\n", sqh->pos, sqh));
   2809 
   2810 	eqh = vf->eqh;
   2811 	sqh->hlink       = eqh->hlink;
   2812 	sqh->qh.qh_hlink = eqh->qh.qh_hlink;
   2813 	eqh->hlink       = sqh;
   2814 	eqh->qh.qh_hlink = htole32(sqh->physaddr | UHCI_PTR_QH);
   2815 	vf->eqh = sqh;
   2816 	vf->bandwidth++;
   2817 }
   2818 
   2819 /* Remove interrupt QH. */
   2820 void
   2821 uhci_remove_intr(uhci_softc_t *sc, uhci_soft_qh_t *sqh)
   2822 {
   2823 	struct uhci_vframe *vf = &sc->sc_vframes[sqh->pos];
   2824 	uhci_soft_qh_t *pqh;
   2825 
   2826 	DPRINTFN(4, ("uhci_remove_intr: n=%d sqh=%p\n", sqh->pos, sqh));
   2827 
   2828 	/* See comment in uhci_remove_ctrl() */
   2829 	if (!(sqh->qh.qh_elink & htole32(UHCI_PTR_T))) {
   2830 		sqh->qh.qh_elink = htole32(UHCI_PTR_T);
   2831 		delay(UHCI_QH_REMOVE_DELAY);
   2832 	}
   2833 
   2834 	pqh = uhci_find_prev_qh(vf->hqh, sqh);
   2835 	pqh->hlink       = sqh->hlink;
   2836 	pqh->qh.qh_hlink = sqh->qh.qh_hlink;
   2837 	delay(UHCI_QH_REMOVE_DELAY);
   2838 	if (vf->eqh == sqh)
   2839 		vf->eqh = pqh;
   2840 	vf->bandwidth--;
   2841 }
   2842 
   2843 usbd_status
   2844 uhci_device_setintr(uhci_softc_t *sc, struct uhci_pipe *upipe, int ival)
   2845 {
   2846 	uhci_soft_qh_t *sqh;
   2847 	int i, npoll, s;
   2848 	u_int bestbw, bw, bestoffs, offs;
   2849 
   2850 	DPRINTFN(2, ("uhci_device_setintr: pipe=%p\n", upipe));
   2851 	if (ival == 0) {
   2852 		printf("uhci_device_setintr: 0 interval\n");
   2853 		return (USBD_INVAL);
   2854 	}
   2855 
   2856 	if (ival > UHCI_VFRAMELIST_COUNT)
   2857 		ival = UHCI_VFRAMELIST_COUNT;
   2858 	npoll = (UHCI_VFRAMELIST_COUNT + ival - 1) / ival;
   2859 	DPRINTFN(2, ("uhci_device_setintr: ival=%d npoll=%d\n", ival, npoll));
   2860 
   2861 	upipe->u.intr.npoll = npoll;
   2862 	upipe->u.intr.qhs =
   2863 		malloc(npoll * sizeof(uhci_soft_qh_t *), M_USBHC, M_WAITOK);
   2864 
   2865 	/*
   2866 	 * Figure out which offset in the schedule that has most
   2867 	 * bandwidth left over.
   2868 	 */
   2869 #define MOD(i) ((i) & (UHCI_VFRAMELIST_COUNT-1))
   2870 	for (bestoffs = offs = 0, bestbw = ~0; offs < ival; offs++) {
   2871 		for (bw = i = 0; i < npoll; i++)
   2872 			bw += sc->sc_vframes[MOD(i * ival + offs)].bandwidth;
   2873 		if (bw < bestbw) {
   2874 			bestbw = bw;
   2875 			bestoffs = offs;
   2876 		}
   2877 	}
   2878 	DPRINTFN(1, ("uhci_device_setintr: bw=%d offs=%d\n", bestbw, bestoffs));
   2879 
   2880 	for(i = 0; i < npoll; i++) {
   2881 		upipe->u.intr.qhs[i] = sqh = uhci_alloc_sqh(sc);
   2882 		sqh->elink = NULL;
   2883 		sqh->qh.qh_elink = htole32(UHCI_PTR_T);
   2884 		sqh->pos = MOD(i * ival + bestoffs);
   2885 	}
   2886 #undef MOD
   2887 
   2888 	s = splusb();
   2889 	/* Enter QHs into the controller data structures. */
   2890 	for(i = 0; i < npoll; i++)
   2891 		uhci_add_intr(sc, upipe->u.intr.qhs[i]);
   2892 	splx(s);
   2893 
   2894 	DPRINTFN(5, ("uhci_device_setintr: returns %p\n", upipe));
   2895 	return (USBD_NORMAL_COMPLETION);
   2896 }
   2897 
   2898 /* Open a new pipe. */
   2899 usbd_status
   2900 uhci_open(usbd_pipe_handle pipe)
   2901 {
   2902 	uhci_softc_t *sc = (uhci_softc_t *)pipe->device->bus;
   2903 	struct uhci_pipe *upipe = (struct uhci_pipe *)pipe;
   2904 	usb_endpoint_descriptor_t *ed = pipe->endpoint->edesc;
   2905 	usbd_status err;
   2906 	int ival;
   2907 
   2908 	DPRINTFN(1, ("uhci_open: pipe=%p, addr=%d, endpt=%d (%d)\n",
   2909 		     pipe, pipe->device->address,
   2910 		     ed->bEndpointAddress, sc->sc_addr));
   2911 
   2912 	upipe->aborting = 0;
   2913 	upipe->nexttoggle = 0;
   2914 
   2915 	if (pipe->device->address == sc->sc_addr) {
   2916 		switch (ed->bEndpointAddress) {
   2917 		case USB_CONTROL_ENDPOINT:
   2918 			pipe->methods = &uhci_root_ctrl_methods;
   2919 			break;
   2920 		case UE_DIR_IN | UHCI_INTR_ENDPT:
   2921 			pipe->methods = &uhci_root_intr_methods;
   2922 			break;
   2923 		default:
   2924 			return (USBD_INVAL);
   2925 		}
   2926 	} else {
   2927 		switch (ed->bmAttributes & UE_XFERTYPE) {
   2928 		case UE_CONTROL:
   2929 			pipe->methods = &uhci_device_ctrl_methods;
   2930 			upipe->u.ctl.sqh = uhci_alloc_sqh(sc);
   2931 			if (upipe->u.ctl.sqh == NULL)
   2932 				goto bad;
   2933 			upipe->u.ctl.setup = uhci_alloc_std(sc);
   2934 			if (upipe->u.ctl.setup == NULL) {
   2935 				uhci_free_sqh(sc, upipe->u.ctl.sqh);
   2936 				goto bad;
   2937 			}
   2938 			upipe->u.ctl.stat = uhci_alloc_std(sc);
   2939 			if (upipe->u.ctl.stat == NULL) {
   2940 				uhci_free_sqh(sc, upipe->u.ctl.sqh);
   2941 				uhci_free_std(sc, upipe->u.ctl.setup);
   2942 				goto bad;
   2943 			}
   2944 			err = usb_allocmem(&sc->sc_bus,
   2945 				  sizeof(usb_device_request_t),
   2946 				  0, &upipe->u.ctl.reqdma);
   2947 			if (err) {
   2948 				uhci_free_sqh(sc, upipe->u.ctl.sqh);
   2949 				uhci_free_std(sc, upipe->u.ctl.setup);
   2950 				uhci_free_std(sc, upipe->u.ctl.stat);
   2951 				goto bad;
   2952 			}
   2953 			break;
   2954 		case UE_INTERRUPT:
   2955 			pipe->methods = &uhci_device_intr_methods;
   2956 			ival = pipe->interval;
   2957 			if (ival == USBD_DEFAULT_INTERVAL)
   2958 				ival = ed->bInterval;
   2959 			return (uhci_device_setintr(sc, upipe, ival));
   2960 		case UE_ISOCHRONOUS:
   2961 			pipe->methods = &uhci_device_isoc_methods;
   2962 			return (uhci_setup_isoc(pipe));
   2963 		case UE_BULK:
   2964 			pipe->methods = &uhci_device_bulk_methods;
   2965 			upipe->u.bulk.sqh = uhci_alloc_sqh(sc);
   2966 			if (upipe->u.bulk.sqh == NULL)
   2967 				goto bad;
   2968 			break;
   2969 		}
   2970 	}
   2971 	return (USBD_NORMAL_COMPLETION);
   2972 
   2973  bad:
   2974 	return (USBD_NOMEM);
   2975 }
   2976 
   2977 /*
   2978  * Data structures and routines to emulate the root hub.
   2979  */
   2980 usb_device_descriptor_t uhci_devd = {
   2981 	USB_DEVICE_DESCRIPTOR_SIZE,
   2982 	UDESC_DEVICE,		/* type */
   2983 	{0x00, 0x01},		/* USB version */
   2984 	UDCLASS_HUB,		/* class */
   2985 	UDSUBCLASS_HUB,		/* subclass */
   2986 	UDPROTO_FSHUB,		/* protocol */
   2987 	64,			/* max packet */
   2988 	{0},{0},{0x00,0x01},	/* device id */
   2989 	1,2,0,			/* string indicies */
   2990 	1			/* # of configurations */
   2991 };
   2992 
   2993 usb_config_descriptor_t uhci_confd = {
   2994 	USB_CONFIG_DESCRIPTOR_SIZE,
   2995 	UDESC_CONFIG,
   2996 	{USB_CONFIG_DESCRIPTOR_SIZE +
   2997 	 USB_INTERFACE_DESCRIPTOR_SIZE +
   2998 	 USB_ENDPOINT_DESCRIPTOR_SIZE},
   2999 	1,
   3000 	1,
   3001 	0,
   3002 	UC_SELF_POWERED,
   3003 	0			/* max power */
   3004 };
   3005 
   3006 usb_interface_descriptor_t uhci_ifcd = {
   3007 	USB_INTERFACE_DESCRIPTOR_SIZE,
   3008 	UDESC_INTERFACE,
   3009 	0,
   3010 	0,
   3011 	1,
   3012 	UICLASS_HUB,
   3013 	UISUBCLASS_HUB,
   3014 	UIPROTO_FSHUB,
   3015 	0
   3016 };
   3017 
   3018 usb_endpoint_descriptor_t uhci_endpd = {
   3019 	USB_ENDPOINT_DESCRIPTOR_SIZE,
   3020 	UDESC_ENDPOINT,
   3021 	UE_DIR_IN | UHCI_INTR_ENDPT,
   3022 	UE_INTERRUPT,
   3023 	{8},
   3024 	255
   3025 };
   3026 
   3027 usb_hub_descriptor_t uhci_hubd_piix = {
   3028 	USB_HUB_DESCRIPTOR_SIZE,
   3029 	UDESC_HUB,
   3030 	2,
   3031 	{ UHD_PWR_NO_SWITCH | UHD_OC_INDIVIDUAL, 0 },
   3032 	50,			/* power on to power good */
   3033 	0,
   3034 	{ 0x00 },		/* both ports are removable */
   3035 };
   3036 
   3037 int
   3038 uhci_str(usb_string_descriptor_t *p, int l, const char *s)
   3039 {
   3040 	int i;
   3041 
   3042 	if (l == 0)
   3043 		return (0);
   3044 	p->bLength = 2 * strlen(s) + 2;
   3045 	if (l == 1)
   3046 		return (1);
   3047 	p->bDescriptorType = UDESC_STRING;
   3048 	l -= 2;
   3049 	for (i = 0; s[i] && l > 1; i++, l -= 2)
   3050 		USETW2(p->bString[i], 0, s[i]);
   3051 	return (2*i+2);
   3052 }
   3053 
   3054 /*
   3055  * The USB hub protocol requires that SET_FEATURE(PORT_RESET) also
   3056  * enables the port, and also states that SET_FEATURE(PORT_ENABLE)
   3057  * should not be used by the USB subsystem.  As we cannot issue a
   3058  * SET_FEATURE(PORT_ENABLE) externally, we must ensure that the port
   3059  * will be enabled as part of the reset.
   3060  *
   3061  * On the VT83C572, the port cannot be successfully enabled until the
   3062  * outstanding "port enable change" and "connection status change"
   3063  * events have been reset.
   3064  */
   3065 Static usbd_status
   3066 uhci_portreset(uhci_softc_t *sc, int index)
   3067 {
   3068 	int lim, port, x;
   3069 
   3070 	if (index == 1)
   3071 		port = UHCI_PORTSC1;
   3072 	else if (index == 2)
   3073 		port = UHCI_PORTSC2;
   3074 	else
   3075 		return (USBD_IOERROR);
   3076 
   3077 	x = URWMASK(UREAD2(sc, port));
   3078 	UWRITE2(sc, port, x | UHCI_PORTSC_PR);
   3079 
   3080 	usb_delay_ms(&sc->sc_bus, USB_PORT_ROOT_RESET_DELAY);
   3081 
   3082 	DPRINTFN(3,("uhci port %d reset, status0 = 0x%04x\n",
   3083 		    index, UREAD2(sc, port)));
   3084 
   3085 	x = URWMASK(UREAD2(sc, port));
   3086 	UWRITE2(sc, port, x & ~UHCI_PORTSC_PR);
   3087 
   3088 	delay(100);
   3089 
   3090 	DPRINTFN(3,("uhci port %d reset, status1 = 0x%04x\n",
   3091 		    index, UREAD2(sc, port)));
   3092 
   3093 	x = URWMASK(UREAD2(sc, port));
   3094 	UWRITE2(sc, port, x  | UHCI_PORTSC_PE);
   3095 
   3096 	for (lim = 10; --lim > 0;) {
   3097 		usb_delay_ms(&sc->sc_bus, USB_PORT_RESET_DELAY);
   3098 
   3099 		x = UREAD2(sc, port);
   3100 
   3101 		DPRINTFN(3,("uhci port %d iteration %u, status = 0x%04x\n",
   3102 			    index, lim, x));
   3103 
   3104 		if (!(x & UHCI_PORTSC_CCS)) {
   3105 			/*
   3106 			 * No device is connected (or was disconnected
   3107 			 * during reset).  Consider the port reset.
   3108 			 * The delay must be long enough to ensure on
   3109 			 * the initial iteration that the device
   3110 			 * connection will have been registered.  50ms
   3111 			 * appears to be sufficient, but 20ms is not.
   3112 			 */
   3113 			DPRINTFN(3,("uhci port %d loop %u, device detached\n",
   3114 				    index, lim));
   3115 			break;
   3116 		}
   3117 
   3118 		if (x & (UHCI_PORTSC_POEDC | UHCI_PORTSC_CSC)) {
   3119 			/*
   3120 			 * Port enabled changed and/or connection
   3121 			 * status changed were set.  Reset either or
   3122 			 * both raised flags (by writing a 1 to that
   3123 			 * bit), and wait again for state to settle.
   3124 			 */
   3125 			UWRITE2(sc, port, URWMASK(x) |
   3126 				(x & (UHCI_PORTSC_POEDC | UHCI_PORTSC_CSC)));
   3127 			continue;
   3128 		}
   3129 
   3130 		if (x & UHCI_PORTSC_PE)
   3131 			/* Port is enabled */
   3132 			break;
   3133 
   3134 		UWRITE2(sc, port, URWMASK(x) | UHCI_PORTSC_PE);
   3135 	}
   3136 
   3137 	DPRINTFN(3,("uhci port %d reset, status2 = 0x%04x\n",
   3138 		    index, UREAD2(sc, port)));
   3139 
   3140 	if (lim <= 0) {
   3141 		DPRINTFN(1,("uhci port %d reset timed out\n", index));
   3142 		return (USBD_TIMEOUT);
   3143 	}
   3144 
   3145 	sc->sc_isreset = 1;
   3146 	return (USBD_NORMAL_COMPLETION);
   3147 }
   3148 
   3149 /*
   3150  * Simulate a hardware hub by handling all the necessary requests.
   3151  */
   3152 usbd_status
   3153 uhci_root_ctrl_transfer(usbd_xfer_handle xfer)
   3154 {
   3155 	usbd_status err;
   3156 
   3157 	/* Insert last in queue. */
   3158 	err = usb_insert_transfer(xfer);
   3159 	if (err)
   3160 		return (err);
   3161 
   3162 	/*
   3163 	 * Pipe isn't running (otherwise err would be USBD_INPROG),
   3164 	 * so start it first.
   3165 	 */
   3166 	return (uhci_root_ctrl_start(SIMPLEQ_FIRST(&xfer->pipe->queue)));
   3167 }
   3168 
   3169 usbd_status
   3170 uhci_root_ctrl_start(usbd_xfer_handle xfer)
   3171 {
   3172 	uhci_softc_t *sc = (uhci_softc_t *)xfer->pipe->device->bus;
   3173 	usb_device_request_t *req;
   3174 	void *buf = NULL;
   3175 	int port, x;
   3176 	int s, len, value, index, status, change, l, totlen = 0;
   3177 	usb_port_status_t ps;
   3178 	usbd_status err;
   3179 
   3180 	if (sc->sc_dying)
   3181 		return (USBD_IOERROR);
   3182 
   3183 #ifdef DIAGNOSTIC
   3184 	if (!(xfer->rqflags & URQ_REQUEST))
   3185 		panic("uhci_root_ctrl_transfer: not a request");
   3186 #endif
   3187 	req = &xfer->request;
   3188 
   3189 	DPRINTFN(2,("uhci_root_ctrl_control type=0x%02x request=%02x\n",
   3190 		    req->bmRequestType, req->bRequest));
   3191 
   3192 	len = UGETW(req->wLength);
   3193 	value = UGETW(req->wValue);
   3194 	index = UGETW(req->wIndex);
   3195 
   3196 	if (len != 0)
   3197 		buf = KERNADDR(&xfer->dmabuf, 0);
   3198 
   3199 #define C(x,y) ((x) | ((y) << 8))
   3200 	switch(C(req->bRequest, req->bmRequestType)) {
   3201 	case C(UR_CLEAR_FEATURE, UT_WRITE_DEVICE):
   3202 	case C(UR_CLEAR_FEATURE, UT_WRITE_INTERFACE):
   3203 	case C(UR_CLEAR_FEATURE, UT_WRITE_ENDPOINT):
   3204 		/*
   3205 		 * DEVICE_REMOTE_WAKEUP and ENDPOINT_HALT are no-ops
   3206 		 * for the integrated root hub.
   3207 		 */
   3208 		break;
   3209 	case C(UR_GET_CONFIG, UT_READ_DEVICE):
   3210 		if (len > 0) {
   3211 			*(u_int8_t *)buf = sc->sc_conf;
   3212 			totlen = 1;
   3213 		}
   3214 		break;
   3215 	case C(UR_GET_DESCRIPTOR, UT_READ_DEVICE):
   3216 		DPRINTFN(2,("uhci_root_ctrl_control wValue=0x%04x\n", value));
   3217 		switch(value >> 8) {
   3218 		case UDESC_DEVICE:
   3219 			if ((value & 0xff) != 0) {
   3220 				err = USBD_IOERROR;
   3221 				goto ret;
   3222 			}
   3223 			totlen = l = min(len, USB_DEVICE_DESCRIPTOR_SIZE);
   3224 			USETW(uhci_devd.idVendor, sc->sc_id_vendor);
   3225 			memcpy(buf, &uhci_devd, l);
   3226 			break;
   3227 		case UDESC_CONFIG:
   3228 			if ((value & 0xff) != 0) {
   3229 				err = USBD_IOERROR;
   3230 				goto ret;
   3231 			}
   3232 			totlen = l = min(len, USB_CONFIG_DESCRIPTOR_SIZE);
   3233 			memcpy(buf, &uhci_confd, l);
   3234 			buf = (char *)buf + l;
   3235 			len -= l;
   3236 			l = min(len, USB_INTERFACE_DESCRIPTOR_SIZE);
   3237 			totlen += l;
   3238 			memcpy(buf, &uhci_ifcd, l);
   3239 			buf = (char *)buf + l;
   3240 			len -= l;
   3241 			l = min(len, USB_ENDPOINT_DESCRIPTOR_SIZE);
   3242 			totlen += l;
   3243 			memcpy(buf, &uhci_endpd, l);
   3244 			break;
   3245 		case UDESC_STRING:
   3246 			if (len == 0)
   3247 				break;
   3248 			*(u_int8_t *)buf = 0;
   3249 			totlen = 1;
   3250 			switch (value & 0xff) {
   3251 			case 0: /* Language table */
   3252 				totlen = uhci_str(buf, len, "\001");
   3253 				break;
   3254 			case 1: /* Vendor */
   3255 				totlen = uhci_str(buf, len, sc->sc_vendor);
   3256 				break;
   3257 			case 2: /* Product */
   3258 				totlen = uhci_str(buf, len, "UHCI root hub");
   3259 				break;
   3260 			}
   3261 			break;
   3262 		default:
   3263 			err = USBD_IOERROR;
   3264 			goto ret;
   3265 		}
   3266 		break;
   3267 	case C(UR_GET_INTERFACE, UT_READ_INTERFACE):
   3268 		if (len > 0) {
   3269 			*(u_int8_t *)buf = 0;
   3270 			totlen = 1;
   3271 		}
   3272 		break;
   3273 	case C(UR_GET_STATUS, UT_READ_DEVICE):
   3274 		if (len > 1) {
   3275 			USETW(((usb_status_t *)buf)->wStatus,UDS_SELF_POWERED);
   3276 			totlen = 2;
   3277 		}
   3278 		break;
   3279 	case C(UR_GET_STATUS, UT_READ_INTERFACE):
   3280 	case C(UR_GET_STATUS, UT_READ_ENDPOINT):
   3281 		if (len > 1) {
   3282 			USETW(((usb_status_t *)buf)->wStatus, 0);
   3283 			totlen = 2;
   3284 		}
   3285 		break;
   3286 	case C(UR_SET_ADDRESS, UT_WRITE_DEVICE):
   3287 		if (value >= USB_MAX_DEVICES) {
   3288 			err = USBD_IOERROR;
   3289 			goto ret;
   3290 		}
   3291 		sc->sc_addr = value;
   3292 		break;
   3293 	case C(UR_SET_CONFIG, UT_WRITE_DEVICE):
   3294 		if (value != 0 && value != 1) {
   3295 			err = USBD_IOERROR;
   3296 			goto ret;
   3297 		}
   3298 		sc->sc_conf = value;
   3299 		break;
   3300 	case C(UR_SET_DESCRIPTOR, UT_WRITE_DEVICE):
   3301 		break;
   3302 	case C(UR_SET_FEATURE, UT_WRITE_DEVICE):
   3303 	case C(UR_SET_FEATURE, UT_WRITE_INTERFACE):
   3304 	case C(UR_SET_FEATURE, UT_WRITE_ENDPOINT):
   3305 		err = USBD_IOERROR;
   3306 		goto ret;
   3307 	case C(UR_SET_INTERFACE, UT_WRITE_INTERFACE):
   3308 		break;
   3309 	case C(UR_SYNCH_FRAME, UT_WRITE_ENDPOINT):
   3310 		break;
   3311 	/* Hub requests */
   3312 	case C(UR_CLEAR_FEATURE, UT_WRITE_CLASS_DEVICE):
   3313 		break;
   3314 	case C(UR_CLEAR_FEATURE, UT_WRITE_CLASS_OTHER):
   3315 		DPRINTFN(3, ("uhci_root_ctrl_control: UR_CLEAR_PORT_FEATURE "
   3316 			     "port=%d feature=%d\n",
   3317 			     index, value));
   3318 		if (index == 1)
   3319 			port = UHCI_PORTSC1;
   3320 		else if (index == 2)
   3321 			port = UHCI_PORTSC2;
   3322 		else {
   3323 			err = USBD_IOERROR;
   3324 			goto ret;
   3325 		}
   3326 		switch(value) {
   3327 		case UHF_PORT_ENABLE:
   3328 			x = URWMASK(UREAD2(sc, port));
   3329 			UWRITE2(sc, port, x & ~UHCI_PORTSC_PE);
   3330 			break;
   3331 		case UHF_PORT_SUSPEND:
   3332 			x = URWMASK(UREAD2(sc, port));
   3333 			UWRITE2(sc, port, x & ~UHCI_PORTSC_SUSP);
   3334 			break;
   3335 		case UHF_PORT_RESET:
   3336 			x = URWMASK(UREAD2(sc, port));
   3337 			UWRITE2(sc, port, x & ~UHCI_PORTSC_PR);
   3338 			break;
   3339 		case UHF_C_PORT_CONNECTION:
   3340 			x = URWMASK(UREAD2(sc, port));
   3341 			UWRITE2(sc, port, x | UHCI_PORTSC_CSC);
   3342 			break;
   3343 		case UHF_C_PORT_ENABLE:
   3344 			x = URWMASK(UREAD2(sc, port));
   3345 			UWRITE2(sc, port, x | UHCI_PORTSC_POEDC);
   3346 			break;
   3347 		case UHF_C_PORT_OVER_CURRENT:
   3348 			x = URWMASK(UREAD2(sc, port));
   3349 			UWRITE2(sc, port, x | UHCI_PORTSC_OCIC);
   3350 			break;
   3351 		case UHF_C_PORT_RESET:
   3352 			sc->sc_isreset = 0;
   3353 			err = USBD_NORMAL_COMPLETION;
   3354 			goto ret;
   3355 		case UHF_PORT_CONNECTION:
   3356 		case UHF_PORT_OVER_CURRENT:
   3357 		case UHF_PORT_POWER:
   3358 		case UHF_PORT_LOW_SPEED:
   3359 		case UHF_C_PORT_SUSPEND:
   3360 		default:
   3361 			err = USBD_IOERROR;
   3362 			goto ret;
   3363 		}
   3364 		break;
   3365 	case C(UR_GET_BUS_STATE, UT_READ_CLASS_OTHER):
   3366 		if (index == 1)
   3367 			port = UHCI_PORTSC1;
   3368 		else if (index == 2)
   3369 			port = UHCI_PORTSC2;
   3370 		else {
   3371 			err = USBD_IOERROR;
   3372 			goto ret;
   3373 		}
   3374 		if (len > 0) {
   3375 			*(u_int8_t *)buf =
   3376 				(UREAD2(sc, port) & UHCI_PORTSC_LS) >>
   3377 				UHCI_PORTSC_LS_SHIFT;
   3378 			totlen = 1;
   3379 		}
   3380 		break;
   3381 	case C(UR_GET_DESCRIPTOR, UT_READ_CLASS_DEVICE):
   3382 		if ((value & 0xff) != 0) {
   3383 			err = USBD_IOERROR;
   3384 			goto ret;
   3385 		}
   3386 		l = min(len, USB_HUB_DESCRIPTOR_SIZE);
   3387 		totlen = l;
   3388 		memcpy(buf, &uhci_hubd_piix, l);
   3389 		break;
   3390 	case C(UR_GET_STATUS, UT_READ_CLASS_DEVICE):
   3391 		if (len != 4) {
   3392 			err = USBD_IOERROR;
   3393 			goto ret;
   3394 		}
   3395 		memset(buf, 0, len);
   3396 		totlen = len;
   3397 		break;
   3398 	case C(UR_GET_STATUS, UT_READ_CLASS_OTHER):
   3399 		if (index == 1)
   3400 			port = UHCI_PORTSC1;
   3401 		else if (index == 2)
   3402 			port = UHCI_PORTSC2;
   3403 		else {
   3404 			err = USBD_IOERROR;
   3405 			goto ret;
   3406 		}
   3407 		if (len != 4) {
   3408 			err = USBD_IOERROR;
   3409 			goto ret;
   3410 		}
   3411 		x = UREAD2(sc, port);
   3412 		status = change = 0;
   3413 		if (x & UHCI_PORTSC_CCS)
   3414 			status |= UPS_CURRENT_CONNECT_STATUS;
   3415 		if (x & UHCI_PORTSC_CSC)
   3416 			change |= UPS_C_CONNECT_STATUS;
   3417 		if (x & UHCI_PORTSC_PE)
   3418 			status |= UPS_PORT_ENABLED;
   3419 		if (x & UHCI_PORTSC_POEDC)
   3420 			change |= UPS_C_PORT_ENABLED;
   3421 		if (x & UHCI_PORTSC_OCI)
   3422 			status |= UPS_OVERCURRENT_INDICATOR;
   3423 		if (x & UHCI_PORTSC_OCIC)
   3424 			change |= UPS_C_OVERCURRENT_INDICATOR;
   3425 		if (x & UHCI_PORTSC_SUSP)
   3426 			status |= UPS_SUSPEND;
   3427 		if (x & UHCI_PORTSC_LSDA)
   3428 			status |= UPS_LOW_SPEED;
   3429 		status |= UPS_PORT_POWER;
   3430 		if (sc->sc_isreset)
   3431 			change |= UPS_C_PORT_RESET;
   3432 		USETW(ps.wPortStatus, status);
   3433 		USETW(ps.wPortChange, change);
   3434 		l = min(len, sizeof ps);
   3435 		memcpy(buf, &ps, l);
   3436 		totlen = l;
   3437 		break;
   3438 	case C(UR_SET_DESCRIPTOR, UT_WRITE_CLASS_DEVICE):
   3439 		err = USBD_IOERROR;
   3440 		goto ret;
   3441 	case C(UR_SET_FEATURE, UT_WRITE_CLASS_DEVICE):
   3442 		break;
   3443 	case C(UR_SET_FEATURE, UT_WRITE_CLASS_OTHER):
   3444 		if (index == 1)
   3445 			port = UHCI_PORTSC1;
   3446 		else if (index == 2)
   3447 			port = UHCI_PORTSC2;
   3448 		else {
   3449 			err = USBD_IOERROR;
   3450 			goto ret;
   3451 		}
   3452 		switch(value) {
   3453 		case UHF_PORT_ENABLE:
   3454 			x = URWMASK(UREAD2(sc, port));
   3455 			UWRITE2(sc, port, x | UHCI_PORTSC_PE);
   3456 			break;
   3457 		case UHF_PORT_SUSPEND:
   3458 			x = URWMASK(UREAD2(sc, port));
   3459 			UWRITE2(sc, port, x | UHCI_PORTSC_SUSP);
   3460 			break;
   3461 		case UHF_PORT_RESET:
   3462 			err = uhci_portreset(sc, index);
   3463 			goto ret;
   3464 		case UHF_PORT_POWER:
   3465 			/* Pretend we turned on power */
   3466 			err = USBD_NORMAL_COMPLETION;
   3467 			goto ret;
   3468 		case UHF_C_PORT_CONNECTION:
   3469 		case UHF_C_PORT_ENABLE:
   3470 		case UHF_C_PORT_OVER_CURRENT:
   3471 		case UHF_PORT_CONNECTION:
   3472 		case UHF_PORT_OVER_CURRENT:
   3473 		case UHF_PORT_LOW_SPEED:
   3474 		case UHF_C_PORT_SUSPEND:
   3475 		case UHF_C_PORT_RESET:
   3476 		default:
   3477 			err = USBD_IOERROR;
   3478 			goto ret;
   3479 		}
   3480 		break;
   3481 	default:
   3482 		err = USBD_IOERROR;
   3483 		goto ret;
   3484 	}
   3485 	xfer->actlen = totlen;
   3486 	err = USBD_NORMAL_COMPLETION;
   3487  ret:
   3488 	xfer->status = err;
   3489 	s = splusb();
   3490 	usb_transfer_complete(xfer);
   3491 	splx(s);
   3492 	return (USBD_IN_PROGRESS);
   3493 }
   3494 
   3495 /* Abort a root control request. */
   3496 void
   3497 uhci_root_ctrl_abort(usbd_xfer_handle xfer)
   3498 {
   3499 	/* Nothing to do, all transfers are synchronous. */
   3500 }
   3501 
   3502 /* Close the root pipe. */
   3503 void
   3504 uhci_root_ctrl_close(usbd_pipe_handle pipe)
   3505 {
   3506 	DPRINTF(("uhci_root_ctrl_close\n"));
   3507 }
   3508 
   3509 /* Abort a root interrupt request. */
   3510 void
   3511 uhci_root_intr_abort(usbd_xfer_handle xfer)
   3512 {
   3513 	uhci_softc_t *sc = (uhci_softc_t *)xfer->pipe->device->bus;
   3514 
   3515 	usb_uncallout(sc->sc_poll_handle, uhci_poll_hub, xfer);
   3516 	sc->sc_intr_xfer = NULL;
   3517 
   3518 	if (xfer->pipe->intrxfer == xfer) {
   3519 		DPRINTF(("uhci_root_intr_abort: remove\n"));
   3520 		xfer->pipe->intrxfer = 0;
   3521 	}
   3522 	xfer->status = USBD_CANCELLED;
   3523 #ifdef DIAGNOSTIC
   3524 	UXFER(xfer)->iinfo.isdone = 1;
   3525 #endif
   3526 	usb_transfer_complete(xfer);
   3527 }
   3528 
   3529 usbd_status
   3530 uhci_root_intr_transfer(usbd_xfer_handle xfer)
   3531 {
   3532 	usbd_status err;
   3533 
   3534 	/* Insert last in queue. */
   3535 	err = usb_insert_transfer(xfer);
   3536 	if (err)
   3537 		return (err);
   3538 
   3539 	/*
   3540 	 * Pipe isn't running (otherwise err would be USBD_INPROG),
   3541 	 * start first
   3542 	 */
   3543 	return (uhci_root_intr_start(SIMPLEQ_FIRST(&xfer->pipe->queue)));
   3544 }
   3545 
   3546 /* Start a transfer on the root interrupt pipe */
   3547 usbd_status
   3548 uhci_root_intr_start(usbd_xfer_handle xfer)
   3549 {
   3550 	usbd_pipe_handle pipe = xfer->pipe;
   3551 	uhci_softc_t *sc = (uhci_softc_t *)pipe->device->bus;
   3552 	unsigned int ival;
   3553 
   3554 	DPRINTFN(3, ("uhci_root_intr_start: xfer=%p len=%d flags=%d\n",
   3555 		     xfer, xfer->length, xfer->flags));
   3556 
   3557 	if (sc->sc_dying)
   3558 		return (USBD_IOERROR);
   3559 
   3560 	/* XXX temporary variable needed to avoid gcc3 warning */
   3561 	ival = xfer->pipe->endpoint->edesc->bInterval;
   3562 	sc->sc_ival = mstohz(ival);
   3563 	usb_callout(sc->sc_poll_handle, sc->sc_ival, uhci_poll_hub, xfer);
   3564 	sc->sc_intr_xfer = xfer;
   3565 	return (USBD_IN_PROGRESS);
   3566 }
   3567 
   3568 /* Close the root interrupt pipe. */
   3569 void
   3570 uhci_root_intr_close(usbd_pipe_handle pipe)
   3571 {
   3572 	uhci_softc_t *sc = (uhci_softc_t *)pipe->device->bus;
   3573 
   3574 	usb_uncallout(sc->sc_poll_handle, uhci_poll_hub, sc->sc_intr_xfer);
   3575 	sc->sc_intr_xfer = NULL;
   3576 	DPRINTF(("uhci_root_intr_close\n"));
   3577 }
   3578