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freebsd-nq/sys/dev/usb/controller/uhci.c
Andrew Thompson a4cadedb58 Add support for LOW speed BULK transfers. This mode is not recommended by the 
USB 2.0 standard, though some USB devices use it anyway.

Submitted by:	Hans Petter Selasky
2010-06-22 20:57:48 +00:00

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/*-
* Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
* Copyright (c) 1998 The NetBSD Foundation, Inc. All rights reserved.
* Copyright (c) 1998 Lennart Augustsson. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* USB Universal Host Controller driver.
* Handles e.g. PIIX3 and PIIX4.
*
* UHCI spec: http://developer.intel.com/design/USB/UHCI11D.htm
* USB spec: http://www.usb.org/developers/docs/usbspec.zip
* PIIXn spec: ftp://download.intel.com/design/intarch/datashts/29055002.pdf
* ftp://download.intel.com/design/intarch/datashts/29056201.pdf
*/
#include <sys/stdint.h>
#include <sys/stddef.h>
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/linker_set.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/condvar.h>
#include <sys/sysctl.h>
#include <sys/sx.h>
#include <sys/unistd.h>
#include <sys/callout.h>
#include <sys/malloc.h>
#include <sys/priv.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#define USB_DEBUG_VAR uhcidebug
#include <dev/usb/usb_core.h>
#include <dev/usb/usb_debug.h>
#include <dev/usb/usb_busdma.h>
#include <dev/usb/usb_process.h>
#include <dev/usb/usb_transfer.h>
#include <dev/usb/usb_device.h>
#include <dev/usb/usb_hub.h>
#include <dev/usb/usb_util.h>
#include <dev/usb/usb_controller.h>
#include <dev/usb/usb_bus.h>
#include <dev/usb/controller/uhci.h>
#include <dev/usb/controller/uhcireg.h>
#define alt_next next
#define UHCI_BUS2SC(bus) \
((uhci_softc_t *)(((uint8_t *)(bus)) - \
((uint8_t *)&(((uhci_softc_t *)0)->sc_bus))))
#ifdef USB_DEBUG
static int uhcidebug = 0;
static int uhcinoloop = 0;
SYSCTL_NODE(_hw_usb, OID_AUTO, uhci, CTLFLAG_RW, 0, "USB uhci");
SYSCTL_INT(_hw_usb_uhci, OID_AUTO, debug, CTLFLAG_RW,
&uhcidebug, 0, "uhci debug level");
SYSCTL_INT(_hw_usb_uhci, OID_AUTO, loop, CTLFLAG_RW,
&uhcinoloop, 0, "uhci noloop");
TUNABLE_INT("hw.usb.uhci.debug", &uhcidebug);
TUNABLE_INT("hw.usb.uhci.loop", &uhcinoloop);
static void uhci_dumpregs(uhci_softc_t *sc);
static void uhci_dump_tds(uhci_td_t *td);
#endif
#define UBARR(sc) bus_space_barrier((sc)->sc_io_tag, (sc)->sc_io_hdl, 0, (sc)->sc_io_size, \
BUS_SPACE_BARRIER_READ|BUS_SPACE_BARRIER_WRITE)
#define UWRITE1(sc, r, x) \
do { UBARR(sc); bus_space_write_1((sc)->sc_io_tag, (sc)->sc_io_hdl, (r), (x)); \
} while (/*CONSTCOND*/0)
#define UWRITE2(sc, r, x) \
do { UBARR(sc); bus_space_write_2((sc)->sc_io_tag, (sc)->sc_io_hdl, (r), (x)); \
} while (/*CONSTCOND*/0)
#define UWRITE4(sc, r, x) \
do { UBARR(sc); bus_space_write_4((sc)->sc_io_tag, (sc)->sc_io_hdl, (r), (x)); \
} while (/*CONSTCOND*/0)
#define UREAD1(sc, r) (UBARR(sc), bus_space_read_1((sc)->sc_io_tag, (sc)->sc_io_hdl, (r)))
#define UREAD2(sc, r) (UBARR(sc), bus_space_read_2((sc)->sc_io_tag, (sc)->sc_io_hdl, (r)))
#define UREAD4(sc, r) (UBARR(sc), bus_space_read_4((sc)->sc_io_tag, (sc)->sc_io_hdl, (r)))
#define UHCICMD(sc, cmd) UWRITE2(sc, UHCI_CMD, cmd)
#define UHCISTS(sc) UREAD2(sc, UHCI_STS)
#define UHCI_RESET_TIMEOUT 100 /* ms, reset timeout */
#define UHCI_INTR_ENDPT 1
struct uhci_mem_layout {
struct usb_page_search buf_res;
struct usb_page_search fix_res;
struct usb_page_cache *buf_pc;
struct usb_page_cache *fix_pc;
uint32_t buf_offset;
uint16_t max_frame_size;
};
struct uhci_std_temp {
struct uhci_mem_layout ml;
uhci_td_t *td;
uhci_td_t *td_next;
uint32_t average;
uint32_t td_status;
uint32_t td_token;
uint32_t len;
uint16_t max_frame_size;
uint8_t shortpkt;
uint8_t setup_alt_next;
uint8_t last_frame;
};
extern struct usb_bus_methods uhci_bus_methods;
extern struct usb_pipe_methods uhci_device_bulk_methods;
extern struct usb_pipe_methods uhci_device_ctrl_methods;
extern struct usb_pipe_methods uhci_device_intr_methods;
extern struct usb_pipe_methods uhci_device_isoc_methods;
static uint8_t uhci_restart(uhci_softc_t *sc);
static void uhci_do_poll(struct usb_bus *);
static void uhci_device_done(struct usb_xfer *, usb_error_t);
static void uhci_transfer_intr_enqueue(struct usb_xfer *);
static void uhci_timeout(void *);
static uint8_t uhci_check_transfer(struct usb_xfer *);
static void uhci_root_intr(uhci_softc_t *sc);
void
uhci_iterate_hw_softc(struct usb_bus *bus, usb_bus_mem_sub_cb_t *cb)
{
struct uhci_softc *sc = UHCI_BUS2SC(bus);
uint32_t i;
cb(bus, &sc->sc_hw.pframes_pc, &sc->sc_hw.pframes_pg,
sizeof(uint32_t) * UHCI_FRAMELIST_COUNT, UHCI_FRAMELIST_ALIGN);
cb(bus, &sc->sc_hw.ls_ctl_start_pc, &sc->sc_hw.ls_ctl_start_pg,
sizeof(uhci_qh_t), UHCI_QH_ALIGN);
cb(bus, &sc->sc_hw.fs_ctl_start_pc, &sc->sc_hw.fs_ctl_start_pg,
sizeof(uhci_qh_t), UHCI_QH_ALIGN);
cb(bus, &sc->sc_hw.bulk_start_pc, &sc->sc_hw.bulk_start_pg,
sizeof(uhci_qh_t), UHCI_QH_ALIGN);
cb(bus, &sc->sc_hw.last_qh_pc, &sc->sc_hw.last_qh_pg,
sizeof(uhci_qh_t), UHCI_QH_ALIGN);
cb(bus, &sc->sc_hw.last_td_pc, &sc->sc_hw.last_td_pg,
sizeof(uhci_td_t), UHCI_TD_ALIGN);
for (i = 0; i != UHCI_VFRAMELIST_COUNT; i++) {
cb(bus, sc->sc_hw.isoc_start_pc + i,
sc->sc_hw.isoc_start_pg + i,
sizeof(uhci_td_t), UHCI_TD_ALIGN);
}
for (i = 0; i != UHCI_IFRAMELIST_COUNT; i++) {
cb(bus, sc->sc_hw.intr_start_pc + i,
sc->sc_hw.intr_start_pg + i,
sizeof(uhci_qh_t), UHCI_QH_ALIGN);
}
}
static void
uhci_mem_layout_init(struct uhci_mem_layout *ml, struct usb_xfer *xfer)
{
ml->buf_pc = xfer->frbuffers + 0;
ml->fix_pc = xfer->buf_fixup;
ml->buf_offset = 0;
ml->max_frame_size = xfer->max_frame_size;
}
static void
uhci_mem_layout_fixup(struct uhci_mem_layout *ml, struct uhci_td *td)
{
usbd_get_page(ml->buf_pc, ml->buf_offset, &ml->buf_res);
if (ml->buf_res.length < td->len) {
/* need to do a fixup */
usbd_get_page(ml->fix_pc, 0, &ml->fix_res);
td->td_buffer = htole32(ml->fix_res.physaddr);
/*
* The UHCI driver cannot handle
* page crossings, so a fixup is
* needed:
*
* +----+----+ - - -
* | YYY|Y |
* +----+----+ - - -
* \ \
* \ \
* +----+
* |YYYY| (fixup)
* +----+
*/
if ((td->td_token & htole32(UHCI_TD_PID)) ==
htole32(UHCI_TD_PID_IN)) {
td->fix_pc = ml->fix_pc;
usb_pc_cpu_invalidate(ml->fix_pc);
} else {
td->fix_pc = NULL;
/* copy data to fixup location */
usbd_copy_out(ml->buf_pc, ml->buf_offset,
ml->fix_res.buffer, td->len);
usb_pc_cpu_flush(ml->fix_pc);
}
/* prepare next fixup */
ml->fix_pc++;
} else {
td->td_buffer = htole32(ml->buf_res.physaddr);
td->fix_pc = NULL;
}
/* prepare next data location */
ml->buf_offset += td->len;
}
/*
* Return values:
* 0: Success
* Else: Failure
*/
static uint8_t
uhci_restart(uhci_softc_t *sc)
{
struct usb_page_search buf_res;
USB_BUS_LOCK_ASSERT(&sc->sc_bus, MA_OWNED);
if (UREAD2(sc, UHCI_CMD) & UHCI_CMD_RS) {
DPRINTFN(2, "Already started\n");
return (0);
}
DPRINTFN(2, "Restarting\n");
usbd_get_page(&sc->sc_hw.pframes_pc, 0, &buf_res);
/* Reload fresh base address */
UWRITE4(sc, UHCI_FLBASEADDR, buf_res.physaddr);
/*
* Assume 64 byte packets at frame end and start HC controller:
*/
UHCICMD(sc, (UHCI_CMD_MAXP | UHCI_CMD_RS));
/* wait 10 milliseconds */
usb_pause_mtx(&sc->sc_bus.bus_mtx, hz / 100);
/* check that controller has started */
if (UREAD2(sc, UHCI_STS) & UHCI_STS_HCH) {
DPRINTFN(2, "Failed\n");
return (1);
}
return (0);
}
void
uhci_reset(uhci_softc_t *sc)
{
uint16_t n;
USB_BUS_LOCK_ASSERT(&sc->sc_bus, MA_OWNED);
DPRINTF("resetting the HC\n");
/* disable interrupts */
UWRITE2(sc, UHCI_INTR, 0);
/* global reset */
UHCICMD(sc, UHCI_CMD_GRESET);
/* wait */
usb_pause_mtx(&sc->sc_bus.bus_mtx,
USB_MS_TO_TICKS(USB_BUS_RESET_DELAY));
/* terminate all transfers */
UHCICMD(sc, UHCI_CMD_HCRESET);
/* the reset bit goes low when the controller is done */
n = UHCI_RESET_TIMEOUT;
while (n--) {
/* wait one millisecond */
usb_pause_mtx(&sc->sc_bus.bus_mtx, hz / 1000);
if (!(UREAD2(sc, UHCI_CMD) & UHCI_CMD_HCRESET)) {
goto done_1;
}
}
device_printf(sc->sc_bus.bdev,
"controller did not reset\n");
done_1:
n = 10;
while (n--) {
/* wait one millisecond */
usb_pause_mtx(&sc->sc_bus.bus_mtx, hz / 1000);
/* check if HC is stopped */
if (UREAD2(sc, UHCI_STS) & UHCI_STS_HCH) {
goto done_2;
}
}
device_printf(sc->sc_bus.bdev,
"controller did not stop\n");
done_2:
/* reload the configuration */
UWRITE2(sc, UHCI_FRNUM, sc->sc_saved_frnum);
UWRITE1(sc, UHCI_SOF, sc->sc_saved_sof);
USB_BUS_UNLOCK(&sc->sc_bus);
/* stop root interrupt */
usb_callout_drain(&sc->sc_root_intr);
USB_BUS_LOCK(&sc->sc_bus);
}
static void
uhci_start(uhci_softc_t *sc)
{
USB_BUS_LOCK_ASSERT(&sc->sc_bus, MA_OWNED);
DPRINTFN(2, "enabling\n");
/* enable interrupts */
UWRITE2(sc, UHCI_INTR,
(UHCI_INTR_TOCRCIE |
UHCI_INTR_RIE |
UHCI_INTR_IOCE |
UHCI_INTR_SPIE));
if (uhci_restart(sc)) {
device_printf(sc->sc_bus.bdev,
"cannot start HC controller\n");
}
/* start root interrupt */
uhci_root_intr(sc);
}
static struct uhci_qh *
uhci_init_qh(struct usb_page_cache *pc)
{
struct usb_page_search buf_res;
struct uhci_qh *qh;
usbd_get_page(pc, 0, &buf_res);
qh = buf_res.buffer;
qh->qh_self =
htole32(buf_res.physaddr) |
htole32(UHCI_PTR_QH);
qh->page_cache = pc;
return (qh);
}
static struct uhci_td *
uhci_init_td(struct usb_page_cache *pc)
{
struct usb_page_search buf_res;
struct uhci_td *td;
usbd_get_page(pc, 0, &buf_res);
td = buf_res.buffer;
td->td_self =
htole32(buf_res.physaddr) |
htole32(UHCI_PTR_TD);
td->page_cache = pc;
return (td);
}
usb_error_t
uhci_init(uhci_softc_t *sc)
{
uint16_t bit;
uint16_t x;
uint16_t y;
DPRINTF("start\n");
usb_callout_init_mtx(&sc->sc_root_intr, &sc->sc_bus.bus_mtx, 0);
#ifdef USB_DEBUG
if (uhcidebug > 2) {
uhci_dumpregs(sc);
}
#endif
sc->sc_saved_sof = 0x40; /* default value */
sc->sc_saved_frnum = 0; /* default frame number */
/*
* Setup QH's
*/
sc->sc_ls_ctl_p_last =
uhci_init_qh(&sc->sc_hw.ls_ctl_start_pc);
sc->sc_fs_ctl_p_last =
uhci_init_qh(&sc->sc_hw.fs_ctl_start_pc);
sc->sc_bulk_p_last =
uhci_init_qh(&sc->sc_hw.bulk_start_pc);
#if 0
sc->sc_reclaim_qh_p =
sc->sc_fs_ctl_p_last;
#else
/* setup reclaim looping point */
sc->sc_reclaim_qh_p =
sc->sc_bulk_p_last;
#endif
sc->sc_last_qh_p =
uhci_init_qh(&sc->sc_hw.last_qh_pc);
sc->sc_last_td_p =
uhci_init_td(&sc->sc_hw.last_td_pc);
for (x = 0; x != UHCI_VFRAMELIST_COUNT; x++) {
sc->sc_isoc_p_last[x] =
uhci_init_td(sc->sc_hw.isoc_start_pc + x);
}
for (x = 0; x != UHCI_IFRAMELIST_COUNT; x++) {
sc->sc_intr_p_last[x] =
uhci_init_qh(sc->sc_hw.intr_start_pc + x);
}
/*
* the QHs are arranged to give poll intervals that are
* powers of 2 times 1ms
*/
bit = UHCI_IFRAMELIST_COUNT / 2;
while (bit) {
x = bit;
while (x & bit) {
uhci_qh_t *qh_x;
uhci_qh_t *qh_y;
y = (x ^ bit) | (bit / 2);
/*
* the next QH has half the poll interval
*/
qh_x = sc->sc_intr_p_last[x];
qh_y = sc->sc_intr_p_last[y];
qh_x->h_next = NULL;
qh_x->qh_h_next = qh_y->qh_self;
qh_x->e_next = NULL;
qh_x->qh_e_next = htole32(UHCI_PTR_T);
x++;
}
bit >>= 1;
}
if (1) {
uhci_qh_t *qh_ls;
uhci_qh_t *qh_intr;
qh_ls = sc->sc_ls_ctl_p_last;
qh_intr = sc->sc_intr_p_last[0];
/* start QH for interrupt traffic */
qh_intr->h_next = qh_ls;
qh_intr->qh_h_next = qh_ls->qh_self;
qh_intr->e_next = 0;
qh_intr->qh_e_next = htole32(UHCI_PTR_T);
}
for (x = 0; x != UHCI_VFRAMELIST_COUNT; x++) {
uhci_td_t *td_x;
uhci_qh_t *qh_intr;
td_x = sc->sc_isoc_p_last[x];
qh_intr = sc->sc_intr_p_last[x | (UHCI_IFRAMELIST_COUNT / 2)];
/* start TD for isochronous traffic */
td_x->next = NULL;
td_x->td_next = qh_intr->qh_self;
td_x->td_status = htole32(UHCI_TD_IOS);
td_x->td_token = htole32(0);
td_x->td_buffer = htole32(0);
}
if (1) {
uhci_qh_t *qh_ls;
uhci_qh_t *qh_fs;
qh_ls = sc->sc_ls_ctl_p_last;
qh_fs = sc->sc_fs_ctl_p_last;
/* start QH where low speed control traffic will be queued */
qh_ls->h_next = qh_fs;
qh_ls->qh_h_next = qh_fs->qh_self;
qh_ls->e_next = 0;
qh_ls->qh_e_next = htole32(UHCI_PTR_T);
}
if (1) {
uhci_qh_t *qh_ctl;
uhci_qh_t *qh_blk;
uhci_qh_t *qh_lst;
uhci_td_t *td_lst;
qh_ctl = sc->sc_fs_ctl_p_last;
qh_blk = sc->sc_bulk_p_last;
/* start QH where full speed control traffic will be queued */
qh_ctl->h_next = qh_blk;
qh_ctl->qh_h_next = qh_blk->qh_self;
qh_ctl->e_next = 0;
qh_ctl->qh_e_next = htole32(UHCI_PTR_T);
qh_lst = sc->sc_last_qh_p;
/* start QH where bulk traffic will be queued */
qh_blk->h_next = qh_lst;
qh_blk->qh_h_next = qh_lst->qh_self;
qh_blk->e_next = 0;
qh_blk->qh_e_next = htole32(UHCI_PTR_T);
td_lst = sc->sc_last_td_p;
/* end QH which is used for looping the QHs */
qh_lst->h_next = 0;
qh_lst->qh_h_next = htole32(UHCI_PTR_T); /* end of QH chain */
qh_lst->e_next = td_lst;
qh_lst->qh_e_next = td_lst->td_self;
/*
* end TD which hangs from the last QH, to avoid a bug in the PIIX
* that makes it run berserk otherwise
*/
td_lst->next = 0;
td_lst->td_next = htole32(UHCI_PTR_T);
td_lst->td_status = htole32(0); /* inactive */
td_lst->td_token = htole32(0);
td_lst->td_buffer = htole32(0);
}
if (1) {
struct usb_page_search buf_res;
uint32_t *pframes;
usbd_get_page(&sc->sc_hw.pframes_pc, 0, &buf_res);
pframes = buf_res.buffer;
/*
* Setup UHCI framelist
*
* Execution order:
*
* pframes -> full speed isochronous -> interrupt QH's -> low
* speed control -> full speed control -> bulk transfers
*
*/
for (x = 0; x != UHCI_FRAMELIST_COUNT; x++) {
pframes[x] =
sc->sc_isoc_p_last[x % UHCI_VFRAMELIST_COUNT]->td_self;
}
}
/* flush all cache into memory */
usb_bus_mem_flush_all(&sc->sc_bus, &uhci_iterate_hw_softc);
/* set up the bus struct */
sc->sc_bus.methods = &uhci_bus_methods;
USB_BUS_LOCK(&sc->sc_bus);
/* reset the controller */
uhci_reset(sc);
/* start the controller */
uhci_start(sc);
USB_BUS_UNLOCK(&sc->sc_bus);
/* catch lost interrupts */
uhci_do_poll(&sc->sc_bus);
return (0);
}
/* NOTE: suspend/resume is called from
* interrupt context and cannot sleep!
*/
void
uhci_suspend(uhci_softc_t *sc)
{
USB_BUS_LOCK(&sc->sc_bus);
#ifdef USB_DEBUG
if (uhcidebug > 2) {
uhci_dumpregs(sc);
}
#endif
/* save some state if BIOS doesn't */
sc->sc_saved_frnum = UREAD2(sc, UHCI_FRNUM);
sc->sc_saved_sof = UREAD1(sc, UHCI_SOF);
/* stop the controller */
uhci_reset(sc);
/* enter global suspend */
UHCICMD(sc, UHCI_CMD_EGSM);
usb_pause_mtx(&sc->sc_bus.bus_mtx,
USB_MS_TO_TICKS(USB_RESUME_WAIT));
USB_BUS_UNLOCK(&sc->sc_bus);
}
void
uhci_resume(uhci_softc_t *sc)
{
USB_BUS_LOCK(&sc->sc_bus);
/* reset the controller */
uhci_reset(sc);
/* force global resume */
UHCICMD(sc, UHCI_CMD_FGR);
usb_pause_mtx(&sc->sc_bus.bus_mtx,
USB_MS_TO_TICKS(USB_RESUME_DELAY));
/* and start traffic again */
uhci_start(sc);
#ifdef USB_DEBUG
if (uhcidebug > 2) {
uhci_dumpregs(sc);
}
#endif
USB_BUS_UNLOCK(&sc->sc_bus);
/* catch lost interrupts */
uhci_do_poll(&sc->sc_bus);
}
#ifdef USB_DEBUG
static void
uhci_dumpregs(uhci_softc_t *sc)
{
DPRINTFN(0, "%s regs: cmd=%04x, sts=%04x, intr=%04x, frnum=%04x, "
"flbase=%08x, sof=%04x, portsc1=%04x, portsc2=%04x\n",
device_get_nameunit(sc->sc_bus.bdev),
UREAD2(sc, UHCI_CMD),
UREAD2(sc, UHCI_STS),
UREAD2(sc, UHCI_INTR),
UREAD2(sc, UHCI_FRNUM),
UREAD4(sc, UHCI_FLBASEADDR),
UREAD1(sc, UHCI_SOF),
UREAD2(sc, UHCI_PORTSC1),
UREAD2(sc, UHCI_PORTSC2));
}
static uint8_t
uhci_dump_td(uhci_td_t *p)
{
uint32_t td_next;
uint32_t td_status;
uint32_t td_token;
uint8_t temp;
usb_pc_cpu_invalidate(p->page_cache);
td_next = le32toh(p->td_next);
td_status = le32toh(p->td_status);
td_token = le32toh(p->td_token);
/*
* Check whether the link pointer in this TD marks the link pointer
* as end of queue:
*/
temp = ((td_next & UHCI_PTR_T) || (td_next == 0));
printf("TD(%p) at 0x%08x = link=0x%08x status=0x%08x "
"token=0x%08x buffer=0x%08x\n",
p,
le32toh(p->td_self),
td_next,
td_status,
td_token,
le32toh(p->td_buffer));
printf("TD(%p) td_next=%s%s%s td_status=%s%s%s%s%s%s%s%s%s%s%s, errcnt=%d, actlen=%d pid=%02x,"
"addr=%d,endpt=%d,D=%d,maxlen=%d\n",
p,
(td_next & 1) ? "-T" : "",
(td_next & 2) ? "-Q" : "",
(td_next & 4) ? "-VF" : "",
(td_status & UHCI_TD_BITSTUFF) ? "-BITSTUFF" : "",
(td_status & UHCI_TD_CRCTO) ? "-CRCTO" : "",
(td_status & UHCI_TD_NAK) ? "-NAK" : "",
(td_status & UHCI_TD_BABBLE) ? "-BABBLE" : "",
(td_status & UHCI_TD_DBUFFER) ? "-DBUFFER" : "",
(td_status & UHCI_TD_STALLED) ? "-STALLED" : "",
(td_status & UHCI_TD_ACTIVE) ? "-ACTIVE" : "",
(td_status & UHCI_TD_IOC) ? "-IOC" : "",
(td_status & UHCI_TD_IOS) ? "-IOS" : "",
(td_status & UHCI_TD_LS) ? "-LS" : "",
(td_status & UHCI_TD_SPD) ? "-SPD" : "",
UHCI_TD_GET_ERRCNT(td_status),
UHCI_TD_GET_ACTLEN(td_status),
UHCI_TD_GET_PID(td_token),
UHCI_TD_GET_DEVADDR(td_token),
UHCI_TD_GET_ENDPT(td_token),
UHCI_TD_GET_DT(td_token),
UHCI_TD_GET_MAXLEN(td_token));
return (temp);
}
static uint8_t
uhci_dump_qh(uhci_qh_t *sqh)
{
uint8_t temp;
uint32_t qh_h_next;
uint32_t qh_e_next;
usb_pc_cpu_invalidate(sqh->page_cache);
qh_h_next = le32toh(sqh->qh_h_next);
qh_e_next = le32toh(sqh->qh_e_next);
DPRINTFN(0, "QH(%p) at 0x%08x: h_next=0x%08x e_next=0x%08x\n", sqh,
le32toh(sqh->qh_self), qh_h_next, qh_e_next);
temp = ((((sqh->h_next != NULL) && !(qh_h_next & UHCI_PTR_T)) ? 1 : 0) |
(((sqh->e_next != NULL) && !(qh_e_next & UHCI_PTR_T)) ? 2 : 0));
return (temp);
}
static void
uhci_dump_all(uhci_softc_t *sc)
{
uhci_dumpregs(sc);
uhci_dump_qh(sc->sc_ls_ctl_p_last);
uhci_dump_qh(sc->sc_fs_ctl_p_last);
uhci_dump_qh(sc->sc_bulk_p_last);
uhci_dump_qh(sc->sc_last_qh_p);
}
static void
uhci_dump_tds(uhci_td_t *td)
{
for (;
td != NULL;
td = td->obj_next) {
if (uhci_dump_td(td)) {
break;
}
}
}
#endif
/*
* Let the last QH loop back to the full speed control transfer QH.
* This is what intel calls "bandwidth reclamation" and improves
* USB performance a lot for some devices.
* If we are already looping, just count it.
*/
static void
uhci_add_loop(uhci_softc_t *sc)
{
struct uhci_qh *qh_lst;
struct uhci_qh *qh_rec;
#ifdef USB_DEBUG
if (uhcinoloop) {
return;
}
#endif
if (++(sc->sc_loops) == 1) {
DPRINTFN(6, "add\n");
qh_lst = sc->sc_last_qh_p;
qh_rec = sc->sc_reclaim_qh_p;
/* NOTE: we don't loop back the soft pointer */
qh_lst->qh_h_next = qh_rec->qh_self;
usb_pc_cpu_flush(qh_lst->page_cache);
}
}
static void
uhci_rem_loop(uhci_softc_t *sc)
{
struct uhci_qh *qh_lst;
#ifdef USB_DEBUG
if (uhcinoloop) {
return;
}
#endif
if (--(sc->sc_loops) == 0) {
DPRINTFN(6, "remove\n");
qh_lst = sc->sc_last_qh_p;
qh_lst->qh_h_next = htole32(UHCI_PTR_T);
usb_pc_cpu_flush(qh_lst->page_cache);
}
}
static void
uhci_transfer_intr_enqueue(struct usb_xfer *xfer)
{
/* check for early completion */
if (uhci_check_transfer(xfer)) {
return;
}
/* put transfer on interrupt queue */
usbd_transfer_enqueue(&xfer->xroot->bus->intr_q, xfer);
/* start timeout, if any */
if (xfer->timeout != 0) {
usbd_transfer_timeout_ms(xfer, &uhci_timeout, xfer->timeout);
}
}
#define UHCI_APPEND_TD(std,last) (last) = _uhci_append_td(std,last)
static uhci_td_t *
_uhci_append_td(uhci_td_t *std, uhci_td_t *last)
{
DPRINTFN(11, "%p to %p\n", std, last);
/* (sc->sc_bus.mtx) must be locked */
std->next = last->next;
std->td_next = last->td_next;
std->prev = last;
usb_pc_cpu_flush(std->page_cache);
/*
* the last->next->prev is never followed: std->next->prev = std;
*/
last->next = std;
last->td_next = std->td_self;
usb_pc_cpu_flush(last->page_cache);
return (std);
}
#define UHCI_APPEND_QH(sqh,last) (last) = _uhci_append_qh(sqh,last)
static uhci_qh_t *
_uhci_append_qh(uhci_qh_t *sqh, uhci_qh_t *last)
{
DPRINTFN(11, "%p to %p\n", sqh, last);
if (sqh->h_prev != NULL) {
/* should not happen */
DPRINTFN(0, "QH already linked!\n");
return (last);
}
/* (sc->sc_bus.mtx) must be locked */
sqh->h_next = last->h_next;
sqh->qh_h_next = last->qh_h_next;
sqh->h_prev = last;
usb_pc_cpu_flush(sqh->page_cache);
/*
* The "last->h_next->h_prev" is never followed:
*
* "sqh->h_next->h_prev" = sqh;
*/
last->h_next = sqh;
last->qh_h_next = sqh->qh_self;
usb_pc_cpu_flush(last->page_cache);
return (sqh);
}
/**/
#define UHCI_REMOVE_TD(std,last) (last) = _uhci_remove_td(std,last)
static uhci_td_t *
_uhci_remove_td(uhci_td_t *std, uhci_td_t *last)
{
DPRINTFN(11, "%p from %p\n", std, last);
/* (sc->sc_bus.mtx) must be locked */
std->prev->next = std->next;
std->prev->td_next = std->td_next;
usb_pc_cpu_flush(std->prev->page_cache);
if (std->next) {
std->next->prev = std->prev;
usb_pc_cpu_flush(std->next->page_cache);
}
return ((last == std) ? std->prev : last);
}
#define UHCI_REMOVE_QH(sqh,last) (last) = _uhci_remove_qh(sqh,last)
static uhci_qh_t *
_uhci_remove_qh(uhci_qh_t *sqh, uhci_qh_t *last)
{
DPRINTFN(11, "%p from %p\n", sqh, last);
/* (sc->sc_bus.mtx) must be locked */
/* only remove if not removed from a queue */
if (sqh->h_prev) {
sqh->h_prev->h_next = sqh->h_next;
sqh->h_prev->qh_h_next = sqh->qh_h_next;
usb_pc_cpu_flush(sqh->h_prev->page_cache);
if (sqh->h_next) {
sqh->h_next->h_prev = sqh->h_prev;
usb_pc_cpu_flush(sqh->h_next->page_cache);
}
last = ((last == sqh) ? sqh->h_prev : last);
sqh->h_prev = 0;
usb_pc_cpu_flush(sqh->page_cache);
}
return (last);
}
static void
uhci_isoc_done(uhci_softc_t *sc, struct usb_xfer *xfer)
{
struct usb_page_search res;
uint32_t nframes = xfer->nframes;
uint32_t status;
uint32_t offset = 0;
uint32_t *plen = xfer->frlengths;
uint16_t len = 0;
uhci_td_t *td = xfer->td_transfer_first;
uhci_td_t **pp_last = &sc->sc_isoc_p_last[xfer->qh_pos];
DPRINTFN(13, "xfer=%p endpoint=%p transfer done\n",
xfer, xfer->endpoint);
/* sync any DMA memory before doing fixups */
usb_bdma_post_sync(xfer);
while (nframes--) {
if (td == NULL) {
panic("%s:%d: out of TD's\n",
__FUNCTION__, __LINE__);
}
if (pp_last >= &sc->sc_isoc_p_last[UHCI_VFRAMELIST_COUNT]) {
pp_last = &sc->sc_isoc_p_last[0];
}
#ifdef USB_DEBUG
if (uhcidebug > 5) {
DPRINTF("isoc TD\n");
uhci_dump_td(td);
}
#endif
usb_pc_cpu_invalidate(td->page_cache);
status = le32toh(td->td_status);
len = UHCI_TD_GET_ACTLEN(status);
if (len > *plen) {
len = *plen;
}
if (td->fix_pc) {
usbd_get_page(td->fix_pc, 0, &res);
/* copy data from fixup location to real location */
usb_pc_cpu_invalidate(td->fix_pc);
usbd_copy_in(xfer->frbuffers, offset,
res.buffer, len);
}
offset += *plen;
*plen = len;
/* remove TD from schedule */
UHCI_REMOVE_TD(td, *pp_last);
pp_last++;
plen++;
td = td->obj_next;
}
xfer->aframes = xfer->nframes;
}
static usb_error_t
uhci_non_isoc_done_sub(struct usb_xfer *xfer)
{
struct usb_page_search res;
uhci_td_t *td;
uhci_td_t *td_alt_next;
uint32_t status;
uint32_t token;
uint16_t len;
td = xfer->td_transfer_cache;
td_alt_next = td->alt_next;
if (xfer->aframes != xfer->nframes) {
usbd_xfer_set_frame_len(xfer, xfer->aframes, 0);
}
while (1) {
usb_pc_cpu_invalidate(td->page_cache);
status = le32toh(td->td_status);
token = le32toh(td->td_token);
/*
* Verify the status and add
* up the actual length:
*/
len = UHCI_TD_GET_ACTLEN(status);
if (len > td->len) {
/* should not happen */
DPRINTF("Invalid status length, "
"0x%04x/0x%04x bytes\n", len, td->len);
status |= UHCI_TD_STALLED;
} else if ((xfer->aframes != xfer->nframes) && (len > 0)) {
if (td->fix_pc) {
usbd_get_page(td->fix_pc, 0, &res);
/*
* copy data from fixup location to real
* location
*/
usb_pc_cpu_invalidate(td->fix_pc);
usbd_copy_in(xfer->frbuffers + xfer->aframes,
xfer->frlengths[xfer->aframes], res.buffer, len);
}
/* update actual length */
xfer->frlengths[xfer->aframes] += len;
}
/* Check for last transfer */
if (((void *)td) == xfer->td_transfer_last) {
td = NULL;
break;
}
if (status & UHCI_TD_STALLED) {
/* the transfer is finished */
td = NULL;
break;
}
/* Check for short transfer */
if (len != td->len) {
if (xfer->flags_int.short_frames_ok) {
/* follow alt next */
td = td->alt_next;
} else {
/* the transfer is finished */
td = NULL;
}
break;
}
td = td->obj_next;
if (td->alt_next != td_alt_next) {
/* this USB frame is complete */
break;
}
}
/* update transfer cache */
xfer->td_transfer_cache = td;
/* update data toggle */
xfer->endpoint->toggle_next = (token & UHCI_TD_SET_DT(1)) ? 0 : 1;
#ifdef USB_DEBUG
if (status & UHCI_TD_ERROR) {
DPRINTFN(11, "error, addr=%d, endpt=0x%02x, frame=0x%02x "
"status=%s%s%s%s%s%s%s%s%s%s%s\n",
xfer->address, xfer->endpointno, xfer->aframes,
(status & UHCI_TD_BITSTUFF) ? "[BITSTUFF]" : "",
(status & UHCI_TD_CRCTO) ? "[CRCTO]" : "",
(status & UHCI_TD_NAK) ? "[NAK]" : "",
(status & UHCI_TD_BABBLE) ? "[BABBLE]" : "",
(status & UHCI_TD_DBUFFER) ? "[DBUFFER]" : "",
(status & UHCI_TD_STALLED) ? "[STALLED]" : "",
(status & UHCI_TD_ACTIVE) ? "[ACTIVE]" : "[NOT_ACTIVE]",
(status & UHCI_TD_IOC) ? "[IOC]" : "",
(status & UHCI_TD_IOS) ? "[IOS]" : "",
(status & UHCI_TD_LS) ? "[LS]" : "",
(status & UHCI_TD_SPD) ? "[SPD]" : "");
}
#endif
return (status & UHCI_TD_STALLED) ?
USB_ERR_STALLED : USB_ERR_NORMAL_COMPLETION;
}
static void
uhci_non_isoc_done(struct usb_xfer *xfer)
{
usb_error_t err = 0;
DPRINTFN(13, "xfer=%p endpoint=%p transfer done\n",
xfer, xfer->endpoint);
#ifdef USB_DEBUG
if (uhcidebug > 10) {
uhci_dump_tds(xfer->td_transfer_first);
}
#endif
/* sync any DMA memory before doing fixups */
usb_bdma_post_sync(xfer);
/* reset scanner */
xfer->td_transfer_cache = xfer->td_transfer_first;
if (xfer->flags_int.control_xfr) {
if (xfer->flags_int.control_hdr) {
err = uhci_non_isoc_done_sub(xfer);
}
xfer->aframes = 1;
if (xfer->td_transfer_cache == NULL) {
goto done;
}
}
while (xfer->aframes != xfer->nframes) {
err = uhci_non_isoc_done_sub(xfer);
xfer->aframes++;
if (xfer->td_transfer_cache == NULL) {
goto done;
}
}
if (xfer->flags_int.control_xfr &&
!xfer->flags_int.control_act) {
err = uhci_non_isoc_done_sub(xfer);
}
done:
uhci_device_done(xfer, err);
}
/*------------------------------------------------------------------------*
* uhci_check_transfer_sub
*
* The main purpose of this function is to update the data-toggle
* in case it is wrong.
*------------------------------------------------------------------------*/
static void
uhci_check_transfer_sub(struct usb_xfer *xfer)
{
uhci_qh_t *qh;
uhci_td_t *td;
uhci_td_t *td_alt_next;
uint32_t td_token;
uint32_t td_self;
td = xfer->td_transfer_cache;
qh = xfer->qh_start[xfer->flags_int.curr_dma_set];
td_token = td->obj_next->td_token;
td = td->alt_next;
xfer->td_transfer_cache = td;
td_self = td->td_self;
td_alt_next = td->alt_next;
if (xfer->flags_int.control_xfr)
goto skip; /* don't touch the DT value! */
if (!((td->td_token ^ td_token) & htole32(UHCI_TD_SET_DT(1))))
goto skip; /* data toggle has correct value */
/*
* The data toggle is wrong and we need to toggle it !
*/
while (1) {
td->td_token ^= htole32(UHCI_TD_SET_DT(1));
usb_pc_cpu_flush(td->page_cache);
if (td == xfer->td_transfer_last) {
/* last transfer */
break;
}
td = td->obj_next;
if (td->alt_next != td_alt_next) {
/* next frame */
break;
}
}
skip:
/* update the QH */
qh->qh_e_next = td_self;
usb_pc_cpu_flush(qh->page_cache);
DPRINTFN(13, "xfer=%p following alt next\n", xfer);
}
/*------------------------------------------------------------------------*
* uhci_check_transfer
*
* Return values:
* 0: USB transfer is not finished
* Else: USB transfer is finished
*------------------------------------------------------------------------*/
static uint8_t
uhci_check_transfer(struct usb_xfer *xfer)
{
uint32_t status;
uint32_t token;
uhci_td_t *td;
DPRINTFN(16, "xfer=%p checking transfer\n", xfer);
if (xfer->endpoint->methods == &uhci_device_isoc_methods) {
/* isochronous transfer */
td = xfer->td_transfer_last;
usb_pc_cpu_invalidate(td->page_cache);
status = le32toh(td->td_status);
/* check also if the first is complete */
td = xfer->td_transfer_first;
usb_pc_cpu_invalidate(td->page_cache);
status |= le32toh(td->td_status);
if (!(status & UHCI_TD_ACTIVE)) {
uhci_device_done(xfer, USB_ERR_NORMAL_COMPLETION);
goto transferred;
}
} else {
/* non-isochronous transfer */
/*
* check whether there is an error somewhere
* in the middle, or whether there was a short
* packet (SPD and not ACTIVE)
*/
td = xfer->td_transfer_cache;
while (1) {
usb_pc_cpu_invalidate(td->page_cache);
status = le32toh(td->td_status);
token = le32toh(td->td_token);
/*
* if there is an active TD the transfer isn't done
*/
if (status & UHCI_TD_ACTIVE) {
/* update cache */
xfer->td_transfer_cache = td;
goto done;
}
/*
* last transfer descriptor makes the transfer done
*/
if (((void *)td) == xfer->td_transfer_last) {
break;
}
/*
* any kind of error makes the transfer done
*/
if (status & UHCI_TD_STALLED) {
break;
}
/*
* check if we reached the last packet
* or if there is a short packet:
*/
if ((td->td_next == htole32(UHCI_PTR_T)) ||
(UHCI_TD_GET_ACTLEN(status) < td->len)) {
if (xfer->flags_int.short_frames_ok) {
/* follow alt next */
if (td->alt_next) {
/* update cache */
xfer->td_transfer_cache = td;
uhci_check_transfer_sub(xfer);
goto done;
}
}
/* transfer is done */
break;
}
td = td->obj_next;
}
uhci_non_isoc_done(xfer);
goto transferred;
}
done:
DPRINTFN(13, "xfer=%p is still active\n", xfer);
return (0);
transferred:
return (1);
}
static void
uhci_interrupt_poll(uhci_softc_t *sc)
{
struct usb_xfer *xfer;
repeat:
TAILQ_FOREACH(xfer, &sc->sc_bus.intr_q.head, wait_entry) {
/*
* check if transfer is transferred
*/
if (uhci_check_transfer(xfer)) {
/* queue has been modified */
goto repeat;
}
}
}
/*------------------------------------------------------------------------*
* uhci_interrupt - UHCI interrupt handler
*
* NOTE: Do not access "sc->sc_bus.bdev" inside the interrupt handler,
* hence the interrupt handler will be setup before "sc->sc_bus.bdev"
* is present !
*------------------------------------------------------------------------*/
void
uhci_interrupt(uhci_softc_t *sc)
{
uint32_t status;
USB_BUS_LOCK(&sc->sc_bus);
DPRINTFN(16, "real interrupt\n");
#ifdef USB_DEBUG
if (uhcidebug > 15) {
uhci_dumpregs(sc);
}
#endif
status = UREAD2(sc, UHCI_STS) & UHCI_STS_ALLINTRS;
if (status == 0) {
/* the interrupt was not for us */
goto done;
}
if (status & (UHCI_STS_RD | UHCI_STS_HSE |
UHCI_STS_HCPE | UHCI_STS_HCH)) {
if (status & UHCI_STS_RD) {
#ifdef USB_DEBUG
printf("%s: resume detect\n",
__FUNCTION__);
#endif
}
if (status & UHCI_STS_HSE) {
printf("%s: host system error\n",
__FUNCTION__);
}
if (status & UHCI_STS_HCPE) {
printf("%s: host controller process error\n",
__FUNCTION__);
}
if (status & UHCI_STS_HCH) {
/* no acknowledge needed */
DPRINTF("%s: host controller halted\n",
__FUNCTION__);
#ifdef USB_DEBUG
if (uhcidebug > 0) {
uhci_dump_all(sc);
}
#endif
}
}
/* get acknowledge bits */
status &= (UHCI_STS_USBINT |
UHCI_STS_USBEI |
UHCI_STS_RD |
UHCI_STS_HSE |
UHCI_STS_HCPE);
if (status == 0) {
/* nothing to acknowledge */
goto done;
}
/* acknowledge interrupts */
UWRITE2(sc, UHCI_STS, status);
/* poll all the USB transfers */
uhci_interrupt_poll(sc);
done:
USB_BUS_UNLOCK(&sc->sc_bus);
}
/*
* called when a request does not complete
*/
static void
uhci_timeout(void *arg)
{
struct usb_xfer *xfer = arg;
DPRINTF("xfer=%p\n", xfer);
USB_BUS_LOCK_ASSERT(xfer->xroot->bus, MA_OWNED);
/* transfer is transferred */
uhci_device_done(xfer, USB_ERR_TIMEOUT);
}
static void
uhci_do_poll(struct usb_bus *bus)
{
struct uhci_softc *sc = UHCI_BUS2SC(bus);
USB_BUS_LOCK(&sc->sc_bus);
uhci_interrupt_poll(sc);
USB_BUS_UNLOCK(&sc->sc_bus);
}
static void
uhci_setup_standard_chain_sub(struct uhci_std_temp *temp)
{
uhci_td_t *td;
uhci_td_t *td_next;
uhci_td_t *td_alt_next;
uint32_t average;
uint32_t len_old;
uint8_t shortpkt_old;
uint8_t precompute;
td_alt_next = NULL;
shortpkt_old = temp->shortpkt;
len_old = temp->len;
precompute = 1;
/* software is used to detect short incoming transfers */
if ((temp->td_token & htole32(UHCI_TD_PID)) == htole32(UHCI_TD_PID_IN)) {
temp->td_status |= htole32(UHCI_TD_SPD);
} else {
temp->td_status &= ~htole32(UHCI_TD_SPD);
}
temp->ml.buf_offset = 0;
restart:
temp->td_token &= ~htole32(UHCI_TD_SET_MAXLEN(0));
temp->td_token |= htole32(UHCI_TD_SET_MAXLEN(temp->average));
td = temp->td;
td_next = temp->td_next;
while (1) {
if (temp->len == 0) {
if (temp->shortpkt) {
break;
}
/* send a Zero Length Packet, ZLP, last */
temp->shortpkt = 1;
temp->td_token |= htole32(UHCI_TD_SET_MAXLEN(0));
average = 0;
} else {
average = temp->average;
if (temp->len < average) {
temp->shortpkt = 1;
temp->td_token &= ~htole32(UHCI_TD_SET_MAXLEN(0));
temp->td_token |= htole32(UHCI_TD_SET_MAXLEN(temp->len));
average = temp->len;
}
}
if (td_next == NULL) {
panic("%s: out of UHCI transfer descriptors!", __FUNCTION__);
}
/* get next TD */
td = td_next;
td_next = td->obj_next;
/* check if we are pre-computing */
if (precompute) {
/* update remaining length */
temp->len -= average;
continue;
}
/* fill out current TD */
td->td_status = temp->td_status;
td->td_token = temp->td_token;
/* update data toggle */
temp->td_token ^= htole32(UHCI_TD_SET_DT(1));
if (average == 0) {
td->len = 0;
td->td_buffer = 0;
td->fix_pc = NULL;
} else {
/* update remaining length */
temp->len -= average;
td->len = average;
/* fill out buffer pointer and do fixup, if any */
uhci_mem_layout_fixup(&temp->ml, td);
}
td->alt_next = td_alt_next;
if ((td_next == td_alt_next) && temp->setup_alt_next) {
/* we need to receive these frames one by one ! */
td->td_status |= htole32(UHCI_TD_IOC);
td->td_next = htole32(UHCI_PTR_T);
} else {
if (td_next) {
/* link the current TD with the next one */
td->td_next = td_next->td_self;
}
}
usb_pc_cpu_flush(td->page_cache);
}
if (precompute) {
precompute = 0;
/* setup alt next pointer, if any */
if (temp->last_frame) {
td_alt_next = NULL;
} else {
/* we use this field internally */
td_alt_next = td_next;
}
/* restore */
temp->shortpkt = shortpkt_old;
temp->len = len_old;
goto restart;
}
temp->td = td;
temp->td_next = td_next;
}
static uhci_td_t *
uhci_setup_standard_chain(struct usb_xfer *xfer)
{
struct uhci_std_temp temp;
uhci_td_t *td;
uint32_t x;
DPRINTFN(9, "addr=%d endpt=%d sumlen=%d speed=%d\n",
xfer->address, UE_GET_ADDR(xfer->endpointno),
xfer->sumlen, usbd_get_speed(xfer->xroot->udev));
temp.average = xfer->max_frame_size;
temp.max_frame_size = xfer->max_frame_size;
/* toggle the DMA set we are using */
xfer->flags_int.curr_dma_set ^= 1;
/* get next DMA set */
td = xfer->td_start[xfer->flags_int.curr_dma_set];
xfer->td_transfer_first = td;
xfer->td_transfer_cache = td;
temp.td = NULL;
temp.td_next = td;
temp.last_frame = 0;
temp.setup_alt_next = xfer->flags_int.short_frames_ok;
uhci_mem_layout_init(&temp.ml, xfer);
temp.td_status =
htole32(UHCI_TD_ZERO_ACTLEN(UHCI_TD_SET_ERRCNT(3) |
UHCI_TD_ACTIVE));
if (xfer->xroot->udev->speed == USB_SPEED_LOW) {
temp.td_status |= htole32(UHCI_TD_LS);
}
temp.td_token =
htole32(UHCI_TD_SET_ENDPT(xfer->endpointno) |
UHCI_TD_SET_DEVADDR(xfer->address));
if (xfer->endpoint->toggle_next) {
/* DATA1 is next */
temp.td_token |= htole32(UHCI_TD_SET_DT(1));
}
/* check if we should prepend a setup message */
if (xfer->flags_int.control_xfr) {
if (xfer->flags_int.control_hdr) {
temp.td_token &= htole32(UHCI_TD_SET_DEVADDR(0x7F) |
UHCI_TD_SET_ENDPT(0xF));
temp.td_token |= htole32(UHCI_TD_PID_SETUP |
UHCI_TD_SET_DT(0));
temp.len = xfer->frlengths[0];
temp.ml.buf_pc = xfer->frbuffers + 0;
temp.shortpkt = temp.len ? 1 : 0;
/* check for last frame */
if (xfer->nframes == 1) {
/* no STATUS stage yet, SETUP is last */
if (xfer->flags_int.control_act) {
temp.last_frame = 1;
temp.setup_alt_next = 0;
}
}
uhci_setup_standard_chain_sub(&temp);
}
x = 1;
} else {
x = 0;
}
while (x != xfer->nframes) {
/* DATA0 / DATA1 message */
temp.len = xfer->frlengths[x];
temp.ml.buf_pc = xfer->frbuffers + x;
x++;
if (x == xfer->nframes) {
if (xfer->flags_int.control_xfr) {
/* no STATUS stage yet, DATA is last */
if (xfer->flags_int.control_act) {
temp.last_frame = 1;
temp.setup_alt_next = 0;
}
} else {
temp.last_frame = 1;
temp.setup_alt_next = 0;
}
}
/*
* Keep previous data toggle,
* device address and endpoint number:
*/
temp.td_token &= htole32(UHCI_TD_SET_DEVADDR(0x7F) |
UHCI_TD_SET_ENDPT(0xF) |
UHCI_TD_SET_DT(1));
if (temp.len == 0) {
/* make sure that we send an USB packet */
temp.shortpkt = 0;
} else {
/* regular data transfer */
temp.shortpkt = (xfer->flags.force_short_xfer) ? 0 : 1;
}
/* set endpoint direction */
temp.td_token |=
(UE_GET_DIR(xfer->endpointno) == UE_DIR_IN) ?
htole32(UHCI_TD_PID_IN) :
htole32(UHCI_TD_PID_OUT);
uhci_setup_standard_chain_sub(&temp);
}
/* check if we should append a status stage */
if (xfer->flags_int.control_xfr &&
!xfer->flags_int.control_act) {
/*
* send a DATA1 message and reverse the current endpoint
* direction
*/
temp.td_token &= htole32(UHCI_TD_SET_DEVADDR(0x7F) |
UHCI_TD_SET_ENDPT(0xF) |
UHCI_TD_SET_DT(1));
temp.td_token |=
(UE_GET_DIR(xfer->endpointno) == UE_DIR_OUT) ?
htole32(UHCI_TD_PID_IN | UHCI_TD_SET_DT(1)) :
htole32(UHCI_TD_PID_OUT | UHCI_TD_SET_DT(1));
temp.len = 0;
temp.ml.buf_pc = NULL;
temp.shortpkt = 0;
temp.last_frame = 1;
temp.setup_alt_next = 0;
uhci_setup_standard_chain_sub(&temp);
}
td = temp.td;
/* Ensure that last TD is terminating: */
td->td_next = htole32(UHCI_PTR_T);
/* set interrupt bit */
td->td_status |= htole32(UHCI_TD_IOC);
usb_pc_cpu_flush(td->page_cache);
/* must have at least one frame! */
xfer->td_transfer_last = td;
#ifdef USB_DEBUG
if (uhcidebug > 8) {
DPRINTF("nexttog=%d; data before transfer:\n",
xfer->endpoint->toggle_next);
uhci_dump_tds(xfer->td_transfer_first);
}
#endif
return (xfer->td_transfer_first);
}
/* NOTE: "done" can be run two times in a row,
* from close and from interrupt
*/
static void
uhci_device_done(struct usb_xfer *xfer, usb_error_t error)
{
struct usb_pipe_methods *methods = xfer->endpoint->methods;
uhci_softc_t *sc = UHCI_BUS2SC(xfer->xroot->bus);
uhci_qh_t *qh;
USB_BUS_LOCK_ASSERT(&sc->sc_bus, MA_OWNED);
DPRINTFN(2, "xfer=%p, endpoint=%p, error=%d\n",
xfer, xfer->endpoint, error);
qh = xfer->qh_start[xfer->flags_int.curr_dma_set];
if (qh) {
usb_pc_cpu_invalidate(qh->page_cache);
}
if (xfer->flags_int.bandwidth_reclaimed) {
xfer->flags_int.bandwidth_reclaimed = 0;
uhci_rem_loop(sc);
}
if (methods == &uhci_device_bulk_methods) {
UHCI_REMOVE_QH(qh, sc->sc_bulk_p_last);
}
if (methods == &uhci_device_ctrl_methods) {
if (xfer->xroot->udev->speed == USB_SPEED_LOW) {
UHCI_REMOVE_QH(qh, sc->sc_ls_ctl_p_last);
} else {
UHCI_REMOVE_QH(qh, sc->sc_fs_ctl_p_last);
}
}
if (methods == &uhci_device_intr_methods) {
UHCI_REMOVE_QH(qh, sc->sc_intr_p_last[xfer->qh_pos]);
}
/*
* Only finish isochronous transfers once
* which will update "xfer->frlengths".
*/
if (xfer->td_transfer_first &&
xfer->td_transfer_last) {
if (methods == &uhci_device_isoc_methods) {
uhci_isoc_done(sc, xfer);
}
xfer->td_transfer_first = NULL;
xfer->td_transfer_last = NULL;
}
/* dequeue transfer and start next transfer */
usbd_transfer_done(xfer, error);
}
/*------------------------------------------------------------------------*
* uhci bulk support
*------------------------------------------------------------------------*/
static void
uhci_device_bulk_open(struct usb_xfer *xfer)
{
return;
}
static void
uhci_device_bulk_close(struct usb_xfer *xfer)
{
uhci_device_done(xfer, USB_ERR_CANCELLED);
}
static void
uhci_device_bulk_enter(struct usb_xfer *xfer)
{
return;
}
static void
uhci_device_bulk_start(struct usb_xfer *xfer)
{
uhci_softc_t *sc = UHCI_BUS2SC(xfer->xroot->bus);
uhci_td_t *td;
uhci_qh_t *qh;
/* setup TD's */
td = uhci_setup_standard_chain(xfer);
/* setup QH */
qh = xfer->qh_start[xfer->flags_int.curr_dma_set];
qh->e_next = td;
qh->qh_e_next = td->td_self;
if (xfer->xroot->udev->flags.self_suspended == 0) {
UHCI_APPEND_QH(qh, sc->sc_bulk_p_last);
uhci_add_loop(sc);
xfer->flags_int.bandwidth_reclaimed = 1;
} else {
usb_pc_cpu_flush(qh->page_cache);
}
/* put transfer on interrupt queue */
uhci_transfer_intr_enqueue(xfer);
}
struct usb_pipe_methods uhci_device_bulk_methods =
{
.open = uhci_device_bulk_open,
.close = uhci_device_bulk_close,
.enter = uhci_device_bulk_enter,
.start = uhci_device_bulk_start,
};
/*------------------------------------------------------------------------*
* uhci control support
*------------------------------------------------------------------------*/
static void
uhci_device_ctrl_open(struct usb_xfer *xfer)
{
return;
}
static void
uhci_device_ctrl_close(struct usb_xfer *xfer)
{
uhci_device_done(xfer, USB_ERR_CANCELLED);
}
static void
uhci_device_ctrl_enter(struct usb_xfer *xfer)
{
return;
}
static void
uhci_device_ctrl_start(struct usb_xfer *xfer)
{
uhci_softc_t *sc = UHCI_BUS2SC(xfer->xroot->bus);
uhci_qh_t *qh;
uhci_td_t *td;
/* setup TD's */
td = uhci_setup_standard_chain(xfer);
/* setup QH */
qh = xfer->qh_start[xfer->flags_int.curr_dma_set];
qh->e_next = td;
qh->qh_e_next = td->td_self;
/*
* NOTE: some devices choke on bandwidth- reclamation for control
* transfers
*/
if (xfer->xroot->udev->flags.self_suspended == 0) {
if (xfer->xroot->udev->speed == USB_SPEED_LOW) {
UHCI_APPEND_QH(qh, sc->sc_ls_ctl_p_last);
} else {
UHCI_APPEND_QH(qh, sc->sc_fs_ctl_p_last);
}
} else {
usb_pc_cpu_flush(qh->page_cache);
}
/* put transfer on interrupt queue */
uhci_transfer_intr_enqueue(xfer);
}
struct usb_pipe_methods uhci_device_ctrl_methods =
{
.open = uhci_device_ctrl_open,
.close = uhci_device_ctrl_close,
.enter = uhci_device_ctrl_enter,
.start = uhci_device_ctrl_start,
};
/*------------------------------------------------------------------------*
* uhci interrupt support
*------------------------------------------------------------------------*/
static void
uhci_device_intr_open(struct usb_xfer *xfer)
{
uhci_softc_t *sc = UHCI_BUS2SC(xfer->xroot->bus);
uint16_t best;
uint16_t bit;
uint16_t x;
best = 0;
bit = UHCI_IFRAMELIST_COUNT / 2;
while (bit) {
if (xfer->interval >= bit) {
x = bit;
best = bit;
while (x & bit) {
if (sc->sc_intr_stat[x] <
sc->sc_intr_stat[best]) {
best = x;
}
x++;
}
break;
}
bit >>= 1;
}
sc->sc_intr_stat[best]++;
xfer->qh_pos = best;
DPRINTFN(3, "best=%d interval=%d\n",
best, xfer->interval);
}
static void
uhci_device_intr_close(struct usb_xfer *xfer)
{
uhci_softc_t *sc = UHCI_BUS2SC(xfer->xroot->bus);
sc->sc_intr_stat[xfer->qh_pos]--;
uhci_device_done(xfer, USB_ERR_CANCELLED);
}
static void
uhci_device_intr_enter(struct usb_xfer *xfer)
{
return;
}
static void
uhci_device_intr_start(struct usb_xfer *xfer)
{
uhci_softc_t *sc = UHCI_BUS2SC(xfer->xroot->bus);
uhci_qh_t *qh;
uhci_td_t *td;
/* setup TD's */
td = uhci_setup_standard_chain(xfer);
/* setup QH */
qh = xfer->qh_start[xfer->flags_int.curr_dma_set];
qh->e_next = td;
qh->qh_e_next = td->td_self;
if (xfer->xroot->udev->flags.self_suspended == 0) {
/* enter QHs into the controller data structures */
UHCI_APPEND_QH(qh, sc->sc_intr_p_last[xfer->qh_pos]);
} else {
usb_pc_cpu_flush(qh->page_cache);
}
/* put transfer on interrupt queue */
uhci_transfer_intr_enqueue(xfer);
}
struct usb_pipe_methods uhci_device_intr_methods =
{
.open = uhci_device_intr_open,
.close = uhci_device_intr_close,
.enter = uhci_device_intr_enter,
.start = uhci_device_intr_start,
};
/*------------------------------------------------------------------------*
* uhci isochronous support
*------------------------------------------------------------------------*/
static void
uhci_device_isoc_open(struct usb_xfer *xfer)
{
uhci_td_t *td;
uint32_t td_token;
uint8_t ds;
td_token =
(UE_GET_DIR(xfer->endpointno) == UE_DIR_IN) ?
UHCI_TD_IN(0, xfer->endpointno, xfer->address, 0) :
UHCI_TD_OUT(0, xfer->endpointno, xfer->address, 0);
td_token = htole32(td_token);
/* initialize all TD's */
for (ds = 0; ds != 2; ds++) {
for (td = xfer->td_start[ds]; td; td = td->obj_next) {
/* mark TD as inactive */
td->td_status = htole32(UHCI_TD_IOS);
td->td_token = td_token;
usb_pc_cpu_flush(td->page_cache);
}
}
}
static void
uhci_device_isoc_close(struct usb_xfer *xfer)
{
uhci_device_done(xfer, USB_ERR_CANCELLED);
}
static void
uhci_device_isoc_enter(struct usb_xfer *xfer)
{
struct uhci_mem_layout ml;
uhci_softc_t *sc = UHCI_BUS2SC(xfer->xroot->bus);
uint32_t nframes;
uint32_t temp;
uint32_t *plen;
#ifdef USB_DEBUG
uint8_t once = 1;
#endif
uhci_td_t *td;
uhci_td_t *td_last = NULL;
uhci_td_t **pp_last;
DPRINTFN(6, "xfer=%p next=%d nframes=%d\n",
xfer, xfer->endpoint->isoc_next, xfer->nframes);
nframes = UREAD2(sc, UHCI_FRNUM);
temp = (nframes - xfer->endpoint->isoc_next) &
(UHCI_VFRAMELIST_COUNT - 1);
if ((xfer->endpoint->is_synced == 0) ||
(temp < xfer->nframes)) {
/*
* If there is data underflow or the pipe queue is empty we
* schedule the transfer a few frames ahead of the current
* frame position. Else two isochronous transfers might
* overlap.
*/
xfer->endpoint->isoc_next = (nframes + 3) & (UHCI_VFRAMELIST_COUNT - 1);
xfer->endpoint->is_synced = 1;
DPRINTFN(3, "start next=%d\n", xfer->endpoint->isoc_next);
}
/*
* compute how many milliseconds the insertion is ahead of the
* current frame position:
*/
temp = (xfer->endpoint->isoc_next - nframes) &
(UHCI_VFRAMELIST_COUNT - 1);
/*
* pre-compute when the isochronous transfer will be finished:
*/
xfer->isoc_time_complete =
usb_isoc_time_expand(&sc->sc_bus, nframes) + temp +
xfer->nframes;
/* get the real number of frames */
nframes = xfer->nframes;
uhci_mem_layout_init(&ml, xfer);
plen = xfer->frlengths;
/* toggle the DMA set we are using */
xfer->flags_int.curr_dma_set ^= 1;
/* get next DMA set */
td = xfer->td_start[xfer->flags_int.curr_dma_set];
xfer->td_transfer_first = td;
pp_last = &sc->sc_isoc_p_last[xfer->endpoint->isoc_next];
/* store starting position */
xfer->qh_pos = xfer->endpoint->isoc_next;
while (nframes--) {
if (td == NULL) {
panic("%s:%d: out of TD's\n",
__FUNCTION__, __LINE__);
}
if (pp_last >= &sc->sc_isoc_p_last[UHCI_VFRAMELIST_COUNT]) {
pp_last = &sc->sc_isoc_p_last[0];
}
if (*plen > xfer->max_frame_size) {
#ifdef USB_DEBUG
if (once) {
once = 0;
printf("%s: frame length(%d) exceeds %d "
"bytes (frame truncated)\n",
__FUNCTION__, *plen,
xfer->max_frame_size);
}
#endif
*plen = xfer->max_frame_size;
}
/* reuse td_token from last transfer */
td->td_token &= htole32(~UHCI_TD_MAXLEN_MASK);
td->td_token |= htole32(UHCI_TD_SET_MAXLEN(*plen));
td->len = *plen;
if (td->len == 0) {
/*
* Do not call "uhci_mem_layout_fixup()" when the
* length is zero!
*/
td->td_buffer = 0;
td->fix_pc = NULL;
} else {
/* fill out buffer pointer and do fixup, if any */
uhci_mem_layout_fixup(&ml, td);
}
/* update status */
if (nframes == 0) {
td->td_status = htole32
(UHCI_TD_ZERO_ACTLEN
(UHCI_TD_SET_ERRCNT(0) |
UHCI_TD_ACTIVE |
UHCI_TD_IOS |
UHCI_TD_IOC));
} else {
td->td_status = htole32
(UHCI_TD_ZERO_ACTLEN
(UHCI_TD_SET_ERRCNT(0) |
UHCI_TD_ACTIVE |
UHCI_TD_IOS));
}
usb_pc_cpu_flush(td->page_cache);
#ifdef USB_DEBUG
if (uhcidebug > 5) {
DPRINTF("TD %d\n", nframes);
uhci_dump_td(td);
}
#endif
/* insert TD into schedule */
UHCI_APPEND_TD(td, *pp_last);
pp_last++;
plen++;
td_last = td;
td = td->obj_next;
}
xfer->td_transfer_last = td_last;
/* update isoc_next */
xfer->endpoint->isoc_next = (pp_last - &sc->sc_isoc_p_last[0]) &
(UHCI_VFRAMELIST_COUNT - 1);
}
static void
uhci_device_isoc_start(struct usb_xfer *xfer)
{
/* put transfer on interrupt queue */
uhci_transfer_intr_enqueue(xfer);
}
struct usb_pipe_methods uhci_device_isoc_methods =
{
.open = uhci_device_isoc_open,
.close = uhci_device_isoc_close,
.enter = uhci_device_isoc_enter,
.start = uhci_device_isoc_start,
};
/*------------------------------------------------------------------------*
* uhci root control support
*------------------------------------------------------------------------*
* Simulate a hardware hub by handling all the necessary requests.
*------------------------------------------------------------------------*/
static const
struct usb_device_descriptor uhci_devd =
{
sizeof(struct usb_device_descriptor),
UDESC_DEVICE, /* type */
{0x00, 0x01}, /* USB version */
UDCLASS_HUB, /* class */
UDSUBCLASS_HUB, /* subclass */
UDPROTO_FSHUB, /* protocol */
64, /* max packet */
{0}, {0}, {0x00, 0x01}, /* device id */
1, 2, 0, /* string indicies */
1 /* # of configurations */
};
static const struct uhci_config_desc uhci_confd = {
.confd = {
.bLength = sizeof(struct usb_config_descriptor),
.bDescriptorType = UDESC_CONFIG,
.wTotalLength[0] = sizeof(uhci_confd),
.bNumInterface = 1,
.bConfigurationValue = 1,
.iConfiguration = 0,
.bmAttributes = UC_SELF_POWERED,
.bMaxPower = 0 /* max power */
},
.ifcd = {
.bLength = sizeof(struct usb_interface_descriptor),
.bDescriptorType = UDESC_INTERFACE,
.bNumEndpoints = 1,
.bInterfaceClass = UICLASS_HUB,
.bInterfaceSubClass = UISUBCLASS_HUB,
.bInterfaceProtocol = UIPROTO_FSHUB,
},
.endpd = {
.bLength = sizeof(struct usb_endpoint_descriptor),
.bDescriptorType = UDESC_ENDPOINT,
.bEndpointAddress = UE_DIR_IN | UHCI_INTR_ENDPT,
.bmAttributes = UE_INTERRUPT,
.wMaxPacketSize[0] = 8, /* max packet (63 ports) */
.bInterval = 255,
},
};
static const
struct usb_hub_descriptor_min uhci_hubd_piix =
{
sizeof(uhci_hubd_piix),
UDESC_HUB,
2,
{UHD_PWR_NO_SWITCH | UHD_OC_INDIVIDUAL, 0},
50, /* power on to power good */
0,
{0x00}, /* both ports are removable */
};
/*
* The USB hub protocol requires that SET_FEATURE(PORT_RESET) also
* enables the port, and also states that SET_FEATURE(PORT_ENABLE)
* should not be used by the USB subsystem. As we cannot issue a
* SET_FEATURE(PORT_ENABLE) externally, we must ensure that the port
* will be enabled as part of the reset.
*
* On the VT83C572, the port cannot be successfully enabled until the
* outstanding "port enable change" and "connection status change"
* events have been reset.
*/
static usb_error_t
uhci_portreset(uhci_softc_t *sc, uint16_t index)
{
uint16_t port;
uint16_t x;
uint8_t lim;
if (index == 1)
port = UHCI_PORTSC1;
else if (index == 2)
port = UHCI_PORTSC2;
else
return (USB_ERR_IOERROR);
/*
* Before we do anything, turn on SOF messages on the USB
* BUS. Some USB devices do not cope without them!
*/
uhci_restart(sc);
x = URWMASK(UREAD2(sc, port));
UWRITE2(sc, port, x | UHCI_PORTSC_PR);
usb_pause_mtx(&sc->sc_bus.bus_mtx,
USB_MS_TO_TICKS(USB_PORT_ROOT_RESET_DELAY));
DPRINTFN(4, "uhci port %d reset, status0 = 0x%04x\n",
index, UREAD2(sc, port));
x = URWMASK(UREAD2(sc, port));
UWRITE2(sc, port, x & ~UHCI_PORTSC_PR);
mtx_unlock(&sc->sc_bus.bus_mtx);
/*
* This delay needs to be exactly 100us, else some USB devices
* fail to attach!
*/
DELAY(100);
mtx_lock(&sc->sc_bus.bus_mtx);
DPRINTFN(4, "uhci port %d reset, status1 = 0x%04x\n",
index, UREAD2(sc, port));
x = URWMASK(UREAD2(sc, port));
UWRITE2(sc, port, x | UHCI_PORTSC_PE);
for (lim = 0; lim < 12; lim++) {
usb_pause_mtx(&sc->sc_bus.bus_mtx,
USB_MS_TO_TICKS(USB_PORT_RESET_DELAY));
x = UREAD2(sc, port);
DPRINTFN(4, "uhci port %d iteration %u, status = 0x%04x\n",
index, lim, x);
if (!(x & UHCI_PORTSC_CCS)) {
/*
* No device is connected (or was disconnected
* during reset). Consider the port reset.
* The delay must be long enough to ensure on
* the initial iteration that the device
* connection will have been registered. 50ms
* appears to be sufficient, but 20ms is not.
*/
DPRINTFN(4, "uhci port %d loop %u, device detached\n",
index, lim);
goto done;
}
if (x & (UHCI_PORTSC_POEDC | UHCI_PORTSC_CSC)) {
/*
* Port enabled changed and/or connection
* status changed were set. Reset either or
* both raised flags (by writing a 1 to that
* bit), and wait again for state to settle.
*/
UWRITE2(sc, port, URWMASK(x) |
(x & (UHCI_PORTSC_POEDC | UHCI_PORTSC_CSC)));
continue;
}
if (x & UHCI_PORTSC_PE) {
/* port is enabled */
goto done;
}
UWRITE2(sc, port, URWMASK(x) | UHCI_PORTSC_PE);
}
DPRINTFN(2, "uhci port %d reset timed out\n", index);
return (USB_ERR_TIMEOUT);
done:
DPRINTFN(4, "uhci port %d reset, status2 = 0x%04x\n",
index, UREAD2(sc, port));
sc->sc_isreset = 1;
return (USB_ERR_NORMAL_COMPLETION);
}
static usb_error_t
uhci_roothub_exec(struct usb_device *udev,
struct usb_device_request *req, const void **pptr, uint16_t *plength)
{
uhci_softc_t *sc = UHCI_BUS2SC(udev->bus);
const void *ptr;
const char *str_ptr;
uint16_t x;
uint16_t port;
uint16_t value;
uint16_t index;
uint16_t status;
uint16_t change;
uint16_t len;
usb_error_t err;
USB_BUS_LOCK_ASSERT(&sc->sc_bus, MA_OWNED);
/* buffer reset */
ptr = (const void *)&sc->sc_hub_desc.temp;
len = 0;
err = 0;
value = UGETW(req->wValue);
index = UGETW(req->wIndex);
DPRINTFN(3, "type=0x%02x request=0x%02x wLen=0x%04x "
"wValue=0x%04x wIndex=0x%04x\n",
req->bmRequestType, req->bRequest,
UGETW(req->wLength), value, index);
#define C(x,y) ((x) | ((y) << 8))
switch (C(req->bRequest, req->bmRequestType)) {
case C(UR_CLEAR_FEATURE, UT_WRITE_DEVICE):
case C(UR_CLEAR_FEATURE, UT_WRITE_INTERFACE):
case C(UR_CLEAR_FEATURE, UT_WRITE_ENDPOINT):
/*
* DEVICE_REMOTE_WAKEUP and ENDPOINT_HALT are no-ops
* for the integrated root hub.
*/
break;
case C(UR_GET_CONFIG, UT_READ_DEVICE):
len = 1;
sc->sc_hub_desc.temp[0] = sc->sc_conf;
break;
case C(UR_GET_DESCRIPTOR, UT_READ_DEVICE):
switch (value >> 8) {
case UDESC_DEVICE:
if ((value & 0xff) != 0) {
err = USB_ERR_IOERROR;
goto done;
}
len = sizeof(uhci_devd);
ptr = (const void *)&uhci_devd;
break;
case UDESC_CONFIG:
if ((value & 0xff) != 0) {
err = USB_ERR_IOERROR;
goto done;
}
len = sizeof(uhci_confd);
ptr = (const void *)&uhci_confd;
break;
case UDESC_STRING:
switch (value & 0xff) {
case 0: /* Language table */
str_ptr = "\001";
break;
case 1: /* Vendor */
str_ptr = sc->sc_vendor;
break;
case 2: /* Product */
str_ptr = "UHCI root HUB";
break;
default:
str_ptr = "";
break;
}
len = usb_make_str_desc
(sc->sc_hub_desc.temp,
sizeof(sc->sc_hub_desc.temp),
str_ptr);
break;
default:
err = USB_ERR_IOERROR;
goto done;
}
break;
case C(UR_GET_INTERFACE, UT_READ_INTERFACE):
len = 1;
sc->sc_hub_desc.temp[0] = 0;
break;
case C(UR_GET_STATUS, UT_READ_DEVICE):
len = 2;
USETW(sc->sc_hub_desc.stat.wStatus, UDS_SELF_POWERED);
break;
case C(UR_GET_STATUS, UT_READ_INTERFACE):
case C(UR_GET_STATUS, UT_READ_ENDPOINT):
len = 2;
USETW(sc->sc_hub_desc.stat.wStatus, 0);
break;
case C(UR_SET_ADDRESS, UT_WRITE_DEVICE):
if (value >= UHCI_MAX_DEVICES) {
err = USB_ERR_IOERROR;
goto done;
}
sc->sc_addr = value;
break;
case C(UR_SET_CONFIG, UT_WRITE_DEVICE):
if ((value != 0) && (value != 1)) {
err = USB_ERR_IOERROR;
goto done;
}
sc->sc_conf = value;
break;
case C(UR_SET_DESCRIPTOR, UT_WRITE_DEVICE):
break;
case C(UR_SET_FEATURE, UT_WRITE_DEVICE):
case C(UR_SET_FEATURE, UT_WRITE_INTERFACE):
case C(UR_SET_FEATURE, UT_WRITE_ENDPOINT):
err = USB_ERR_IOERROR;
goto done;
case C(UR_SET_INTERFACE, UT_WRITE_INTERFACE):
break;
case C(UR_SYNCH_FRAME, UT_WRITE_ENDPOINT):
break;
/* Hub requests */
case C(UR_CLEAR_FEATURE, UT_WRITE_CLASS_DEVICE):
break;
case C(UR_CLEAR_FEATURE, UT_WRITE_CLASS_OTHER):
DPRINTFN(4, "UR_CLEAR_PORT_FEATURE "
"port=%d feature=%d\n",
index, value);
if (index == 1)
port = UHCI_PORTSC1;
else if (index == 2)
port = UHCI_PORTSC2;
else {
err = USB_ERR_IOERROR;
goto done;
}
switch (value) {
case UHF_PORT_ENABLE:
x = URWMASK(UREAD2(sc, port));
UWRITE2(sc, port, x & ~UHCI_PORTSC_PE);
break;
case UHF_PORT_SUSPEND:
x = URWMASK(UREAD2(sc, port));
UWRITE2(sc, port, x & ~(UHCI_PORTSC_SUSP));
break;
case UHF_PORT_RESET:
x = URWMASK(UREAD2(sc, port));
UWRITE2(sc, port, x & ~UHCI_PORTSC_PR);
break;
case UHF_C_PORT_CONNECTION:
x = URWMASK(UREAD2(sc, port));
UWRITE2(sc, port, x | UHCI_PORTSC_CSC);
break;
case UHF_C_PORT_ENABLE:
x = URWMASK(UREAD2(sc, port));
UWRITE2(sc, port, x | UHCI_PORTSC_POEDC);
break;
case UHF_C_PORT_OVER_CURRENT:
x = URWMASK(UREAD2(sc, port));
UWRITE2(sc, port, x | UHCI_PORTSC_OCIC);
break;
case UHF_C_PORT_RESET:
sc->sc_isreset = 0;
err = USB_ERR_NORMAL_COMPLETION;
goto done;
case UHF_C_PORT_SUSPEND:
sc->sc_isresumed &= ~(1 << index);
break;
case UHF_PORT_CONNECTION:
case UHF_PORT_OVER_CURRENT:
case UHF_PORT_POWER:
case UHF_PORT_LOW_SPEED:
default:
err = USB_ERR_IOERROR;
goto done;
}
break;
case C(UR_GET_BUS_STATE, UT_READ_CLASS_OTHER):
if (index == 1)
port = UHCI_PORTSC1;
else if (index == 2)
port = UHCI_PORTSC2;
else {
err = USB_ERR_IOERROR;
goto done;
}
len = 1;
sc->sc_hub_desc.temp[0] =
((UREAD2(sc, port) & UHCI_PORTSC_LS) >>
UHCI_PORTSC_LS_SHIFT);
break;
case C(UR_GET_DESCRIPTOR, UT_READ_CLASS_DEVICE):
if ((value & 0xff) != 0) {
err = USB_ERR_IOERROR;
goto done;
}
len = sizeof(uhci_hubd_piix);
ptr = (const void *)&uhci_hubd_piix;
break;
case C(UR_GET_STATUS, UT_READ_CLASS_DEVICE):
len = 16;
bzero(sc->sc_hub_desc.temp, 16);
break;
case C(UR_GET_STATUS, UT_READ_CLASS_OTHER):
if (index == 1)
port = UHCI_PORTSC1;
else if (index == 2)
port = UHCI_PORTSC2;
else {
err = USB_ERR_IOERROR;
goto done;
}
x = UREAD2(sc, port);
status = change = 0;
if (x & UHCI_PORTSC_CCS)
status |= UPS_CURRENT_CONNECT_STATUS;
if (x & UHCI_PORTSC_CSC)
change |= UPS_C_CONNECT_STATUS;
if (x & UHCI_PORTSC_PE)
status |= UPS_PORT_ENABLED;
if (x & UHCI_PORTSC_POEDC)
change |= UPS_C_PORT_ENABLED;
if (x & UHCI_PORTSC_OCI)
status |= UPS_OVERCURRENT_INDICATOR;
if (x & UHCI_PORTSC_OCIC)
change |= UPS_C_OVERCURRENT_INDICATOR;
if (x & UHCI_PORTSC_LSDA)
status |= UPS_LOW_SPEED;
if ((x & UHCI_PORTSC_PE) && (x & UHCI_PORTSC_RD)) {
/* need to do a write back */
UWRITE2(sc, port, URWMASK(x));
/* wait 20ms for resume sequence to complete */
usb_pause_mtx(&sc->sc_bus.bus_mtx, hz / 50);
/* clear suspend and resume detect */
UWRITE2(sc, port, URWMASK(x) & ~(UHCI_PORTSC_RD |
UHCI_PORTSC_SUSP));
/* wait a little bit */
usb_pause_mtx(&sc->sc_bus.bus_mtx, hz / 500);
sc->sc_isresumed |= (1 << index);
} else if (x & UHCI_PORTSC_SUSP) {
status |= UPS_SUSPEND;
}
status |= UPS_PORT_POWER;
if (sc->sc_isresumed & (1 << index))
change |= UPS_C_SUSPEND;
if (sc->sc_isreset)
change |= UPS_C_PORT_RESET;
USETW(sc->sc_hub_desc.ps.wPortStatus, status);
USETW(sc->sc_hub_desc.ps.wPortChange, change);
len = sizeof(sc->sc_hub_desc.ps);
break;
case C(UR_SET_DESCRIPTOR, UT_WRITE_CLASS_DEVICE):
err = USB_ERR_IOERROR;
goto done;
case C(UR_SET_FEATURE, UT_WRITE_CLASS_DEVICE):
break;
case C(UR_SET_FEATURE, UT_WRITE_CLASS_OTHER):
if (index == 1)
port = UHCI_PORTSC1;
else if (index == 2)
port = UHCI_PORTSC2;
else {
err = USB_ERR_IOERROR;
goto done;
}
switch (value) {
case UHF_PORT_ENABLE:
x = URWMASK(UREAD2(sc, port));
UWRITE2(sc, port, x | UHCI_PORTSC_PE);
break;
case UHF_PORT_SUSPEND:
x = URWMASK(UREAD2(sc, port));
UWRITE2(sc, port, x | UHCI_PORTSC_SUSP);
break;
case UHF_PORT_RESET:
err = uhci_portreset(sc, index);
goto done;
case UHF_PORT_POWER:
/* pretend we turned on power */
err = USB_ERR_NORMAL_COMPLETION;
goto done;
case UHF_C_PORT_CONNECTION:
case UHF_C_PORT_ENABLE:
case UHF_C_PORT_OVER_CURRENT:
case UHF_PORT_CONNECTION:
case UHF_PORT_OVER_CURRENT:
case UHF_PORT_LOW_SPEED:
case UHF_C_PORT_SUSPEND:
case UHF_C_PORT_RESET:
default:
err = USB_ERR_IOERROR;
goto done;
}
break;
default:
err = USB_ERR_IOERROR;
goto done;
}
done:
*plength = len;
*pptr = ptr;
return (err);
}
/*
* This routine is executed periodically and simulates interrupts from
* the root controller interrupt pipe for port status change:
*/
static void
uhci_root_intr(uhci_softc_t *sc)
{
DPRINTFN(21, "\n");
USB_BUS_LOCK_ASSERT(&sc->sc_bus, MA_OWNED);
sc->sc_hub_idata[0] = 0;
if (UREAD2(sc, UHCI_PORTSC1) & (UHCI_PORTSC_CSC |
UHCI_PORTSC_OCIC | UHCI_PORTSC_RD)) {
sc->sc_hub_idata[0] |= 1 << 1;
}
if (UREAD2(sc, UHCI_PORTSC2) & (UHCI_PORTSC_CSC |
UHCI_PORTSC_OCIC | UHCI_PORTSC_RD)) {
sc->sc_hub_idata[0] |= 1 << 2;
}
/* restart timer */
usb_callout_reset(&sc->sc_root_intr, hz,
(void *)&uhci_root_intr, sc);
if (sc->sc_hub_idata[0] != 0) {
uhub_root_intr(&sc->sc_bus, sc->sc_hub_idata,
sizeof(sc->sc_hub_idata));
}
}
static void
uhci_xfer_setup(struct usb_setup_params *parm)
{
struct usb_page_search page_info;
struct usb_page_cache *pc;
uhci_softc_t *sc;
struct usb_xfer *xfer;
void *last_obj;
uint32_t ntd;
uint32_t nqh;
uint32_t nfixup;
uint32_t n;
uint16_t align;
sc = UHCI_BUS2SC(parm->udev->bus);
xfer = parm->curr_xfer;
parm->hc_max_packet_size = 0x500;
parm->hc_max_packet_count = 1;
parm->hc_max_frame_size = 0x500;
/*
* compute ntd and nqh
*/
if (parm->methods == &uhci_device_ctrl_methods) {
xfer->flags_int.bdma_enable = 1;
xfer->flags_int.bdma_no_post_sync = 1;
usbd_transfer_setup_sub(parm);
/* see EHCI HC driver for proof of "ntd" formula */
nqh = 1;
ntd = ((2 * xfer->nframes) + 1 /* STATUS */
+ (xfer->max_data_length / xfer->max_frame_size));
} else if (parm->methods == &uhci_device_bulk_methods) {
xfer->flags_int.bdma_enable = 1;
xfer->flags_int.bdma_no_post_sync = 1;
usbd_transfer_setup_sub(parm);
nqh = 1;
ntd = ((2 * xfer->nframes)
+ (xfer->max_data_length / xfer->max_frame_size));
} else if (parm->methods == &uhci_device_intr_methods) {
xfer->flags_int.bdma_enable = 1;
xfer->flags_int.bdma_no_post_sync = 1;
usbd_transfer_setup_sub(parm);
nqh = 1;
ntd = ((2 * xfer->nframes)
+ (xfer->max_data_length / xfer->max_frame_size));
} else if (parm->methods == &uhci_device_isoc_methods) {
xfer->flags_int.bdma_enable = 1;
xfer->flags_int.bdma_no_post_sync = 1;
usbd_transfer_setup_sub(parm);
nqh = 0;
ntd = xfer->nframes;
} else {
usbd_transfer_setup_sub(parm);
nqh = 0;
ntd = 0;
}
if (parm->err) {
return;
}
/*
* NOTE: the UHCI controller requires that
* every packet must be contiguous on
* the same USB memory page !
*/
nfixup = (parm->bufsize / USB_PAGE_SIZE) + 1;
/*
* Compute a suitable power of two alignment
* for our "max_frame_size" fixup buffer(s):
*/
align = xfer->max_frame_size;
n = 0;
while (align) {
align >>= 1;
n++;
}
/* check for power of two */
if (!(xfer->max_frame_size &
(xfer->max_frame_size - 1))) {
n--;
}
/*
* We don't allow alignments of
* less than 8 bytes:
*
* NOTE: Allocating using an aligment
* of 1 byte has special meaning!
*/
if (n < 3) {
n = 3;
}
align = (1 << n);
if (usbd_transfer_setup_sub_malloc(
parm, &pc, xfer->max_frame_size,
align, nfixup)) {
parm->err = USB_ERR_NOMEM;
return;
}
xfer->buf_fixup = pc;
alloc_dma_set:
if (parm->err) {
return;
}
last_obj = NULL;
if (usbd_transfer_setup_sub_malloc(
parm, &pc, sizeof(uhci_td_t),
UHCI_TD_ALIGN, ntd)) {
parm->err = USB_ERR_NOMEM;
return;
}
if (parm->buf) {
for (n = 0; n != ntd; n++) {
uhci_td_t *td;
usbd_get_page(pc + n, 0, &page_info);
td = page_info.buffer;
/* init TD */
if ((parm->methods == &uhci_device_bulk_methods) ||
(parm->methods == &uhci_device_ctrl_methods) ||
(parm->methods == &uhci_device_intr_methods)) {
/* set depth first bit */
td->td_self = htole32(page_info.physaddr |
UHCI_PTR_TD | UHCI_PTR_VF);
} else {
td->td_self = htole32(page_info.physaddr |
UHCI_PTR_TD);
}
td->obj_next = last_obj;
td->page_cache = pc + n;
last_obj = td;
usb_pc_cpu_flush(pc + n);
}
}
xfer->td_start[xfer->flags_int.curr_dma_set] = last_obj;
last_obj = NULL;
if (usbd_transfer_setup_sub_malloc(
parm, &pc, sizeof(uhci_qh_t),
UHCI_QH_ALIGN, nqh)) {
parm->err = USB_ERR_NOMEM;
return;
}
if (parm->buf) {
for (n = 0; n != nqh; n++) {
uhci_qh_t *qh;
usbd_get_page(pc + n, 0, &page_info);
qh = page_info.buffer;
/* init QH */
qh->qh_self = htole32(page_info.physaddr | UHCI_PTR_QH);
qh->obj_next = last_obj;
qh->page_cache = pc + n;
last_obj = qh;
usb_pc_cpu_flush(pc + n);
}
}
xfer->qh_start[xfer->flags_int.curr_dma_set] = last_obj;
if (!xfer->flags_int.curr_dma_set) {
xfer->flags_int.curr_dma_set = 1;
goto alloc_dma_set;
}
}
static void
uhci_ep_init(struct usb_device *udev, struct usb_endpoint_descriptor *edesc,
struct usb_endpoint *ep)
{
uhci_softc_t *sc = UHCI_BUS2SC(udev->bus);
DPRINTFN(2, "endpoint=%p, addr=%d, endpt=%d, mode=%d (%d)\n",
ep, udev->address,
edesc->bEndpointAddress, udev->flags.usb_mode,
sc->sc_addr);
if (udev->flags.usb_mode != USB_MODE_HOST) {
/* not supported */
return;
}
if (udev->device_index != sc->sc_addr) {
switch (edesc->bmAttributes & UE_XFERTYPE) {
case UE_CONTROL:
ep->methods = &uhci_device_ctrl_methods;
break;
case UE_INTERRUPT:
ep->methods = &uhci_device_intr_methods;
break;
case UE_ISOCHRONOUS:
if (udev->speed == USB_SPEED_FULL) {
ep->methods = &uhci_device_isoc_methods;
}
break;
case UE_BULK:
ep->methods = &uhci_device_bulk_methods;
break;
default:
/* do nothing */
break;
}
}
}
static void
uhci_xfer_unsetup(struct usb_xfer *xfer)
{
return;
}
static void
uhci_get_dma_delay(struct usb_bus *bus, uint32_t *pus)
{
/*
* Wait until hardware has finished any possible use of the
* transfer descriptor(s) and QH
*/
*pus = (1125); /* microseconds */
}
static void
uhci_device_resume(struct usb_device *udev)
{
struct uhci_softc *sc = UHCI_BUS2SC(udev->bus);
struct usb_xfer *xfer;
struct usb_pipe_methods *methods;
uhci_qh_t *qh;
DPRINTF("\n");
USB_BUS_LOCK(udev->bus);
TAILQ_FOREACH(xfer, &sc->sc_bus.intr_q.head, wait_entry) {
if (xfer->xroot->udev == udev) {
methods = xfer->endpoint->methods;
qh = xfer->qh_start[xfer->flags_int.curr_dma_set];
if (methods == &uhci_device_bulk_methods) {
UHCI_APPEND_QH(qh, sc->sc_bulk_p_last);
uhci_add_loop(sc);
xfer->flags_int.bandwidth_reclaimed = 1;
}
if (methods == &uhci_device_ctrl_methods) {
if (xfer->xroot->udev->speed == USB_SPEED_LOW) {
UHCI_APPEND_QH(qh, sc->sc_ls_ctl_p_last);
} else {
UHCI_APPEND_QH(qh, sc->sc_fs_ctl_p_last);
}
}
if (methods == &uhci_device_intr_methods) {
UHCI_APPEND_QH(qh, sc->sc_intr_p_last[xfer->qh_pos]);
}
}
}
USB_BUS_UNLOCK(udev->bus);
return;
}
static void
uhci_device_suspend(struct usb_device *udev)
{
struct uhci_softc *sc = UHCI_BUS2SC(udev->bus);
struct usb_xfer *xfer;
struct usb_pipe_methods *methods;
uhci_qh_t *qh;
DPRINTF("\n");
USB_BUS_LOCK(udev->bus);
TAILQ_FOREACH(xfer, &sc->sc_bus.intr_q.head, wait_entry) {
if (xfer->xroot->udev == udev) {
methods = xfer->endpoint->methods;
qh = xfer->qh_start[xfer->flags_int.curr_dma_set];
if (xfer->flags_int.bandwidth_reclaimed) {
xfer->flags_int.bandwidth_reclaimed = 0;
uhci_rem_loop(sc);
}
if (methods == &uhci_device_bulk_methods) {
UHCI_REMOVE_QH(qh, sc->sc_bulk_p_last);
}
if (methods == &uhci_device_ctrl_methods) {
if (xfer->xroot->udev->speed == USB_SPEED_LOW) {
UHCI_REMOVE_QH(qh, sc->sc_ls_ctl_p_last);
} else {
UHCI_REMOVE_QH(qh, sc->sc_fs_ctl_p_last);
}
}
if (methods == &uhci_device_intr_methods) {
UHCI_REMOVE_QH(qh, sc->sc_intr_p_last[xfer->qh_pos]);
}
}
}
USB_BUS_UNLOCK(udev->bus);
return;
}
static void
uhci_set_hw_power(struct usb_bus *bus)
{
struct uhci_softc *sc = UHCI_BUS2SC(bus);
uint32_t flags;
DPRINTF("\n");
USB_BUS_LOCK(bus);
flags = bus->hw_power_state;
/*
* WARNING: Some FULL speed USB devices require periodic SOF
* messages! If any USB devices are connected through the
* UHCI, power save will be disabled!
*/
if (flags & (USB_HW_POWER_CONTROL |
USB_HW_POWER_NON_ROOT_HUB |
USB_HW_POWER_BULK |
USB_HW_POWER_INTERRUPT |
USB_HW_POWER_ISOC)) {
DPRINTF("Some USB transfer is "
"active on unit %u.\n",
device_get_unit(sc->sc_bus.bdev));
uhci_restart(sc);
} else {
DPRINTF("Power save on unit %u.\n",
device_get_unit(sc->sc_bus.bdev));
UHCICMD(sc, UHCI_CMD_MAXP);
}
USB_BUS_UNLOCK(bus);
return;
}
struct usb_bus_methods uhci_bus_methods =
{
.endpoint_init = uhci_ep_init,
.xfer_setup = uhci_xfer_setup,
.xfer_unsetup = uhci_xfer_unsetup,
.get_dma_delay = uhci_get_dma_delay,
.device_resume = uhci_device_resume,
.device_suspend = uhci_device_suspend,
.set_hw_power = uhci_set_hw_power,
.roothub_exec = uhci_roothub_exec,
.xfer_poll = uhci_do_poll,
};
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