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freebsd-nq/sys/dev/pccbb/pccbb.c
Warner Losh 523675f64c Use the standard FreeBSD license for these files. 
Approved by: imp, jon
2005-01-13 19:05:25 +00:00

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/*-
* Copyright (c) 2002-2004 M. Warner Losh.
* Copyright (c) 2000-2001 Jonathan Chen.
* 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.
*
*/
/*-
* Copyright (c) 1998, 1999 and 2000
* HAYAKAWA Koichi. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by HAYAKAWA Koichi.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
*/
/*
* Driver for PCI to CardBus Bridge chips
* and PCI to PCMCIA Bridge chips
* and ISA to PCMCIA host adapters
* and C Bus to PCMCIA host adapters
*
* References:
* TI Datasheets:
* http://www-s.ti.com/cgi-bin/sc/generic2.cgi?family=PCI+CARDBUS+CONTROLLERS
*
* Written by Jonathan Chen <jon@freebsd.org>
* The author would like to acknowledge:
* * HAYAKAWA Koichi: Author of the NetBSD code for the same thing
* * Warner Losh: Newbus/newcard guru and author of the pccard side of things
* * YAMAMOTO Shigeru: Author of another FreeBSD cardbus driver
* * David Cross: Author of the initial ugly hack for a specific cardbus card
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/condvar.h>
#include <sys/errno.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/kthread.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/rman.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <machine/clock.h>
#include <dev/pccard/pccardreg.h>
#include <dev/pccard/pccardvar.h>
#include <dev/exca/excareg.h>
#include <dev/exca/excavar.h>
#include <dev/pccbb/pccbbreg.h>
#include <dev/pccbb/pccbbvar.h>
#include "power_if.h"
#include "card_if.h"
#include "pcib_if.h"
#define DPRINTF(x) do { if (cbb_debug) printf x; } while (0)
#define DEVPRINTF(x) do { if (cbb_debug) device_printf x; } while (0)
#define PCI_MASK_CONFIG(DEV,REG,MASK,SIZE) \
pci_write_config(DEV, REG, pci_read_config(DEV, REG, SIZE) MASK, SIZE)
#define PCI_MASK2_CONFIG(DEV,REG,MASK1,MASK2,SIZE) \
pci_write_config(DEV, REG, ( \
pci_read_config(DEV, REG, SIZE) MASK1) MASK2, SIZE)
#define CBB_CARD_PRESENT(s) ((s & CBB_STATE_CD) == 0)
#define CBB_START_MEM 0x88000000
#define CBB_START_32_IO 0x1000
#define CBB_START_16_IO 0x100
devclass_t cbb_devclass;
/* sysctl vars */
SYSCTL_NODE(_hw, OID_AUTO, cbb, CTLFLAG_RD, 0, "CBB parameters");
/* There's no way to say TUNEABLE_LONG to get the right types */
u_long cbb_start_mem = CBB_START_MEM;
TUNABLE_INT("hw.cbb.start_memory", (int *)&cbb_start_mem);
SYSCTL_ULONG(_hw_cbb, OID_AUTO, start_memory, CTLFLAG_RW,
&cbb_start_mem, CBB_START_MEM,
"Starting address for memory allocations");
u_long cbb_start_16_io = CBB_START_16_IO;
TUNABLE_INT("hw.cbb.start_16_io", (int *)&cbb_start_16_io);
SYSCTL_ULONG(_hw_cbb, OID_AUTO, start_16_io, CTLFLAG_RW,
&cbb_start_16_io, CBB_START_16_IO,
"Starting ioport for 16-bit cards");
u_long cbb_start_32_io = CBB_START_32_IO;
TUNABLE_INT("hw.cbb.start_32_io", (int *)&cbb_start_32_io);
SYSCTL_ULONG(_hw_cbb, OID_AUTO, start_32_io, CTLFLAG_RW,
&cbb_start_32_io, CBB_START_32_IO,
"Starting ioport for 32-bit cards");
int cbb_debug = 0;
TUNABLE_INT("hw.cbb.debug", &cbb_debug);
SYSCTL_ULONG(_hw_cbb, OID_AUTO, debug, CTLFLAG_RW, &cbb_debug, 0,
"Verbose cardbus bridge debugging");
static void cbb_insert(struct cbb_softc *sc);
static void cbb_removal(struct cbb_softc *sc);
static int cbb_detect_voltage(device_t brdev);
static void cbb_cardbus_reset(device_t brdev);
static int cbb_cardbus_io_open(device_t brdev, int win, uint32_t start,
uint32_t end);
static int cbb_cardbus_mem_open(device_t brdev, int win,
uint32_t start, uint32_t end);
static void cbb_cardbus_auto_open(struct cbb_softc *sc, int type);
static int cbb_cardbus_activate_resource(device_t brdev, device_t child,
int type, int rid, struct resource *res);
static int cbb_cardbus_deactivate_resource(device_t brdev,
device_t child, int type, int rid, struct resource *res);
static struct resource *cbb_cardbus_alloc_resource(device_t brdev,
device_t child, int type, int *rid, u_long start,
u_long end, u_long count, u_int flags);
static int cbb_cardbus_release_resource(device_t brdev, device_t child,
int type, int rid, struct resource *res);
static int cbb_cardbus_power_enable_socket(device_t brdev,
device_t child);
static void cbb_cardbus_power_disable_socket(device_t brdev,
device_t child);
static void cbb_func_intr(void *arg);
static void
cbb_remove_res(struct cbb_softc *sc, struct resource *res)
{
struct cbb_reslist *rle;
SLIST_FOREACH(rle, &sc->rl, link) {
if (rle->res == res) {
SLIST_REMOVE(&sc->rl, rle, cbb_reslist, link);
free(rle, M_DEVBUF);
return;
}
}
}
static struct resource *
cbb_find_res(struct cbb_softc *sc, int type, int rid)
{
struct cbb_reslist *rle;
SLIST_FOREACH(rle, &sc->rl, link)
if (SYS_RES_MEMORY == rle->type && rid == rle->rid)
return (rle->res);
return (NULL);
}
static void
cbb_insert_res(struct cbb_softc *sc, struct resource *res, int type,
int rid)
{
struct cbb_reslist *rle;
/*
* Need to record allocated resource so we can iterate through
* it later.
*/
rle = malloc(sizeof(struct cbb_reslist), M_DEVBUF, M_NOWAIT);
if (rle == NULL)
panic("cbb_cardbus_alloc_resource: can't record entry!");
rle->res = res;
rle->type = type;
rle->rid = rid;
SLIST_INSERT_HEAD(&sc->rl, rle, link);
}
static void
cbb_destroy_res(struct cbb_softc *sc)
{
struct cbb_reslist *rle;
while ((rle = SLIST_FIRST(&sc->rl)) != NULL) {
device_printf(sc->dev, "Danger Will Robinson: Resource "
"left allocated! This is a bug... "
"(rid=%x, type=%d, addr=%lx)\n", rle->rid, rle->type,
rman_get_start(rle->res));
SLIST_REMOVE_HEAD(&sc->rl, link);
free(rle, M_DEVBUF);
}
}
/*
* Disable function interrupts by telling the bridge to generate IRQ1
* interrupts. These interrupts aren't really generated by the chip, since
* IRQ1 is reserved. Some chipsets assert INTA# inappropriately during
* initialization, so this helps to work around the problem.
*
* XXX We can't do this workaround for all chipsets, because this
* XXX causes interference with the keyboard because somechipsets will
* XXX actually signal IRQ1 over their serial interrupt connections to
* XXX the south bridge. Disable it it for now.
*/
void
cbb_disable_func_intr(struct cbb_softc *sc)
{
#if 0
uint8_t reg;
reg = (exca_getb(&sc->exca[0], EXCA_INTR) & ~EXCA_INTR_IRQ_MASK) |
EXCA_INTR_IRQ_RESERVED1;
exca_putb(&sc->exca[0], EXCA_INTR, reg);
#endif
}
/*
* Enable function interrupts. We turn on function interrupts when the card
* requests an interrupt. The PCMCIA standard says that we should set
* the lower 4 bits to 0 to route via PCI. Note: we call this for both
* CardBus and R2 (PC Card) cases, but it should have no effect on CardBus
* cards.
*/
static void
cbb_enable_func_intr(struct cbb_softc *sc)
{
uint8_t reg;
reg = (exca_getb(&sc->exca[0], EXCA_INTR) & ~EXCA_INTR_IRQ_MASK) |
EXCA_INTR_IRQ_NONE;
exca_putb(&sc->exca[0], EXCA_INTR, reg);
}
int
cbb_detach(device_t brdev)
{
struct cbb_softc *sc = device_get_softc(brdev);
int numdevs;
device_t *devlist;
int tmp;
int error;
device_get_children(brdev, &devlist, &numdevs);
error = 0;
for (tmp = 0; tmp < numdevs; tmp++) {
if (device_detach(devlist[tmp]) == 0)
device_delete_child(brdev, devlist[tmp]);
else
error++;
}
free(devlist, M_TEMP);
if (error > 0)
return (ENXIO);
mtx_lock(&sc->mtx);
/*
* XXX do we teardown all the ones still registered to guard against
* XXX buggy client drivers?
*/
bus_teardown_intr(brdev, sc->irq_res, sc->intrhand);
sc->flags |= CBB_KTHREAD_DONE;
if (sc->flags & CBB_KTHREAD_RUNNING) {
cv_broadcast(&sc->cv);
msleep(sc->event_thread, &sc->mtx, PWAIT, "cbbun", 0);
}
mtx_unlock(&sc->mtx);
bus_release_resource(brdev, SYS_RES_IRQ, 0, sc->irq_res);
bus_release_resource(brdev, SYS_RES_MEMORY, CBBR_SOCKBASE,
sc->base_res);
mtx_destroy(&sc->mtx);
cv_destroy(&sc->cv);
return (0);
}
int
cbb_shutdown(device_t brdev)
{
struct cbb_softc *sc = (struct cbb_softc *)device_get_softc(brdev);
/* properly reset everything at shutdown */
PCI_MASK_CONFIG(brdev, CBBR_BRIDGECTRL, |CBBM_BRIDGECTRL_RESET, 2);
exca_clrb(&sc->exca[0], EXCA_INTR, EXCA_INTR_RESET);
cbb_set(sc, CBB_SOCKET_MASK, 0);
cbb_power(brdev, CARD_OFF);
exca_putb(&sc->exca[0], EXCA_ADDRWIN_ENABLE, 0);
pci_write_config(brdev, CBBR_MEMBASE0, 0, 4);
pci_write_config(brdev, CBBR_MEMLIMIT0, 0, 4);
pci_write_config(brdev, CBBR_MEMBASE1, 0, 4);
pci_write_config(brdev, CBBR_MEMLIMIT1, 0, 4);
pci_write_config(brdev, CBBR_IOBASE0, 0, 4);
pci_write_config(brdev, CBBR_IOLIMIT0, 0, 4);
pci_write_config(brdev, CBBR_IOBASE1, 0, 4);
pci_write_config(brdev, CBBR_IOLIMIT1, 0, 4);
pci_write_config(brdev, PCIR_COMMAND, 0, 2);
return (0);
}
int
cbb_setup_intr(device_t dev, device_t child, struct resource *irq,
int flags, driver_intr_t *intr, void *arg, void **cookiep)
{
struct cbb_intrhand *ih;
struct cbb_softc *sc = device_get_softc(dev);
int err;
/*
* Well, this is no longer strictly true. You can have multiple
* FAST ISRs, but can't mix fast and slow, so we have to assume
* least common denominator until the base system supports mixing
* and matching better.
*/
if ((flags & INTR_FAST) != 0)
return (EINVAL);
ih = malloc(sizeof(struct cbb_intrhand), M_DEVBUF, M_NOWAIT);
if (ih == NULL)
return (ENOMEM);
*cookiep = ih;
ih->intr = intr;
ih->arg = arg;
ih->sc = sc;
/*
* XXX need to turn on ISA interrupts, if we ever support them, but
* XXX for now that's all we need to do.
*/
err = BUS_SETUP_INTR(device_get_parent(dev), child, irq, flags,
cbb_func_intr, ih, &ih->cookie);
if (err != 0) {
free(ih, M_DEVBUF);
return (err);
}
STAILQ_INSERT_TAIL(&sc->intr_handlers, ih, entries);
cbb_enable_func_intr(sc);
sc->flags |= CBB_CARD_OK;
return 0;
}
int
cbb_teardown_intr(device_t dev, device_t child, struct resource *irq,
void *cookie)
{
struct cbb_intrhand *ih;
struct cbb_softc *sc = device_get_softc(dev);
int err;
/* XXX Need to do different things for ISA interrupts. */
ih = (struct cbb_intrhand *) cookie;
err = BUS_TEARDOWN_INTR(device_get_parent(dev), child, irq,
ih->cookie);
if (err != 0)
return (err);
STAILQ_REMOVE(&sc->intr_handlers, ih, cbb_intrhand, entries);
free(ih, M_DEVBUF);
return (0);
}
void
cbb_driver_added(device_t brdev, driver_t *driver)
{
struct cbb_softc *sc = device_get_softc(brdev);
device_t *devlist;
device_t dev;
int tmp;
int numdevs;
int wake = 0;
DEVICE_IDENTIFY(driver, brdev);
device_get_children(brdev, &devlist, &numdevs);
for (tmp = 0; tmp < numdevs; tmp++) {
dev = devlist[tmp];
if (device_get_state(dev) == DS_NOTPRESENT &&
device_probe_and_attach(dev) == 0)
wake++;
}
free(devlist, M_TEMP);
if (wake > 0) {
mtx_lock(&sc->mtx);
cv_signal(&sc->cv);
mtx_unlock(&sc->mtx);
}
}
void
cbb_child_detached(device_t brdev, device_t child)
{
struct cbb_softc *sc = device_get_softc(brdev);
if (child != sc->cbdev && child != sc->exca[0].pccarddev)
device_printf(brdev, "Unknown child detached: %s\n",
device_get_nameunit(child));
}
/************************************************************************/
/* Kthreads */
/************************************************************************/
void
cbb_event_thread(void *arg)
{
struct cbb_softc *sc = arg;
uint32_t status;
int err;
int not_a_card = 0;
sc->flags |= CBB_KTHREAD_RUNNING;
while ((sc->flags & CBB_KTHREAD_DONE) == 0) {
/*
* We take out Giant here because we need it deep,
* down in the bowels of the vm system for mapping the
* memory we need to read the CIS. In addition, since
* we are adding/deleting devices from the dev tree,
* and that code isn't MP safe, we have to hold Giant.
*/
mtx_lock(&Giant);
status = cbb_get(sc, CBB_SOCKET_STATE);
DPRINTF(("Status is 0x%x\n", status));
if (!CBB_CARD_PRESENT(status)) {
not_a_card = 0; /* We know card type */
cbb_removal(sc);
} else if (status & CBB_STATE_NOT_A_CARD) {
/*
* Up to 20 times, try to rescan the card when we
* see NOT_A_CARD.
*/
if (not_a_card++ < 20) {
DEVPRINTF((sc->dev,
"Not a card bit set, rescanning\n"));
cbb_setb(sc, CBB_SOCKET_FORCE, CBB_FORCE_CV_TEST);
} else {
device_printf(sc->dev,
"Can't determine card type\n");
}
} else {
not_a_card = 0; /* We know card type */
cbb_insert(sc);
}
mtx_unlock(&Giant);
/*
* Wait until it has been 1s since the last time we
* get an interrupt. We handle the rest of the interrupt
* at the top of the loop. Although we clear the bit in the
* ISR, we signal sc->cv from the detach path after we've
* set the CBB_KTHREAD_DONE bit, so we can't do a simple
* 1s sleep here.
*
* In our ISR, we turn off the card changed interrupt. Turn
* them back on here before we wait for them to happen. We
* turn them on/off so that we can tolerate a large latency
* between the time we signal cbb_event_thread and it gets
* a chance to run.
*/
mtx_lock(&sc->mtx);
cbb_setb(sc, CBB_SOCKET_MASK, CBB_SOCKET_MASK_CD);
cv_wait(&sc->cv, &sc->mtx);
err = 0;
while (err != EWOULDBLOCK &&
(sc->flags & CBB_KTHREAD_DONE) == 0)
err = cv_timedwait(&sc->cv, &sc->mtx, 1 * hz);
mtx_unlock(&sc->mtx);
}
sc->flags &= ~CBB_KTHREAD_RUNNING;
kthread_exit(0);
}
/************************************************************************/
/* Insert/removal */
/************************************************************************/
static void
cbb_insert(struct cbb_softc *sc)
{
uint32_t sockevent, sockstate;
sockevent = cbb_get(sc, CBB_SOCKET_EVENT);
sockstate = cbb_get(sc, CBB_SOCKET_STATE);
DEVPRINTF((sc->dev, "card inserted: event=0x%08x, state=%08x\n",
sockevent, sockstate));
if (sockstate & CBB_STATE_R2_CARD) {
if (sc->exca[0].pccarddev) {
sc->flags |= CBB_16BIT_CARD;
exca_insert(&sc->exca[0]);
}
} else if (sockstate & CBB_STATE_CB_CARD) {
if (sc->cbdev != NULL) {
sc->flags &= ~CBB_16BIT_CARD;
CARD_ATTACH_CARD(sc->cbdev);
} else {
device_printf(sc->dev,
"CardBus card inserted, but no cardbus bus.\n");
}
} else {
/*
* We should power the card down, and try again a couple of
* times if this happens. XXX
*/
device_printf(sc->dev, "Unsupported card type detected\n");
}
}
static void
cbb_removal(struct cbb_softc *sc)
{
sc->flags &= ~CBB_CARD_OK;
if (sc->flags & CBB_16BIT_CARD) {
exca_removal(&sc->exca[0]);
} else {
if (sc->cbdev != NULL)
CARD_DETACH_CARD(sc->cbdev);
}
cbb_destroy_res(sc);
}
/************************************************************************/
/* Interrupt Handler */
/************************************************************************/
/*
* Since we touch hardware in the worst case, we don't need to use atomic
* ops on the CARD_OK tests. They would save us a trip to the hardware
* if CARD_OK was recently cleared and the caches haven't updated yet.
* However, an atomic op costs between 100-200 CPU cycles. On a 3GHz
* machine, this is about 33-66ns, whereas a trip the the hardware
* is about that. On slower machines, the cost is even higher, so the
* trip to the hardware is cheaper and achieves the same ends that
* a fully locked operation would give us.
*
* This is a separate routine because we'd have to use locking and/or
* other synchronization in cbb_intr to do this there. That would be
* even more expensive.
*
* I need to investigate what this means for a SMP machine with multiple
* CPUs servicing the ISR when an eject happens. In the case of a dirty
* eject, CD glitches and we might read 'card present' from the hardware
* due to this jitter. If we assumed that cbb_intr() ran before
* cbb_func_intr(), we could just check the SOCKET_MASK register and if
* CD changes were clear there, then we'd know the card was gone.
*/
static void
cbb_func_intr(void *arg)
{
struct cbb_intrhand *ih = (struct cbb_intrhand *)arg;
struct cbb_softc *sc = ih->sc;
/*
* Make sure that the card is really there.
*/
if ((sc->flags & CBB_CARD_OK) == 0)
return;
if (!CBB_CARD_PRESENT(cbb_get(sc, CBB_SOCKET_STATE))) {
sc->flags &= ~CBB_CARD_OK;
return;
}
/*
* nb: don't have to check for giant or not, since that's done
* in the ISR dispatch
*/
(*ih->intr)(ih->arg);
}
void
cbb_intr(void *arg)
{
struct cbb_softc *sc = arg;
uint32_t sockevent;
/*
* This ISR needs work XXX
*/
sockevent = cbb_get(sc, CBB_SOCKET_EVENT);
if (sockevent != 0) {
/* ack the interrupt */
cbb_setb(sc, CBB_SOCKET_EVENT, sockevent);
/*
* If anything has happened to the socket, we assume that
* the card is no longer OK, and we shouldn't call its
* ISR. We set CARD_OK as soon as we've attached the
* card. This helps in a noisy eject, which happens
* all too often when users are ejecting their PC Cards.
*
* We use this method in preference to checking to see if
* the card is still there because the check suffers from
* a race condition in the bouncing case. Prior versions
* of the pccard software used a similar trick and achieved
* excellent results.
*/
if (sockevent & CBB_SOCKET_EVENT_CD) {
mtx_lock(&sc->mtx);
cbb_setb(sc, CBB_SOCKET_MASK, CBB_SOCKET_MASK_CD);
sc->flags &= ~CBB_CARD_OK;
cbb_disable_func_intr(sc);
cv_signal(&sc->cv);
mtx_unlock(&sc->mtx);
}
}
/*
* Some chips also require us to read the old ExCA registe for
* card status change when we route CSC vis PCI. This isn't supposed
* to be required, but it clears the interrupt state on some chipsets.
* Maybe there's a setting that would obviate its need. Maybe we
* should test the status bits and deal with them, but so far we've
* not found any machines that don't also give us the socket status
* indication above.
*
* We have to call this unconditionally because some bridges deliver
* the even independent of the CBB_SOCKET_EVENT_CD above.
*/
exca_getb(&sc->exca[0], EXCA_CSC);
}
/************************************************************************/
/* Generic Power functions */
/************************************************************************/
static int
cbb_detect_voltage(device_t brdev)
{
struct cbb_softc *sc = device_get_softc(brdev);
uint32_t psr;
int vol = CARD_UKN_CARD;
psr = cbb_get(sc, CBB_SOCKET_STATE);
if (psr & CBB_STATE_5VCARD)
vol |= CARD_5V_CARD;
if (psr & CBB_STATE_3VCARD)
vol |= CARD_3V_CARD;
if (psr & CBB_STATE_XVCARD)
vol |= CARD_XV_CARD;
if (psr & CBB_STATE_YVCARD)
vol |= CARD_YV_CARD;
return (vol);
}
static uint8_t
cbb_o2micro_power_hack(struct cbb_softc *sc)
{
uint8_t reg;
/*
* Issue #2: INT# not qualified with IRQ Routing Bit. An
* unexpected PCI INT# may be generated during PC-Card
* initialization even with the IRQ Routing Bit Set with some
* PC-Cards.
*
* This is a two part issue. The first part is that some of
* our older controllers have an issue in which the slot's PCI
* INT# is NOT qualified by the IRQ routing bit (PCI reg. 3Eh
* bit 7). Regardless of the IRQ routing bit, if NO ISA IRQ
* is selected (ExCA register 03h bits 3:0, of the slot, are
* cleared) we will generate INT# if IREQ# is asserted. The
* second part is because some PC-Cards prematurally assert
* IREQ# before the ExCA registers are fully programmed. This
* in turn asserts INT# because ExCA register 03h bits 3:0
* (ISA IRQ Select) are not yet programmed.
*
* The fix for this issue, which will work for any controller
* (old or new), is to set ExCA register 03h bits 3:0 = 0001b
* (select IRQ1), of the slot, before turning on slot power.
* Selecting IRQ1 will result in INT# NOT being asserted
* (because IRQ1 is selected), and IRQ1 won't be asserted
* because our controllers don't generate IRQ1.
*/
reg = exca_getb(&sc->exca[0], EXCA_INTR);
exca_putb(&sc->exca[0], EXCA_INTR, (reg & 0xf0) | 1);
return (reg);
}
/*
* Restore the damage that cbb_o2micro_power_hack does to EXCA_INTR so
* we don't have an interrupt storm on power on. This has the efect of
* disabling card status change interrupts for the duration of poweron.
*/
static void
cbb_o2micro_power_hack2(struct cbb_softc *sc, uint8_t reg)
{
exca_putb(&sc->exca[0], EXCA_INTR, reg);
}
int
cbb_power(device_t brdev, int volts)
{
uint32_t status, sock_ctrl;
struct cbb_softc *sc = device_get_softc(brdev);
int timeout;
int retval = 0;
uint32_t sockevent;
uint8_t reg = 0;
status = cbb_get(sc, CBB_SOCKET_STATE);
sock_ctrl = cbb_get(sc, CBB_SOCKET_CONTROL);
sock_ctrl &= ~CBB_SOCKET_CTRL_VCCMASK;
switch (volts & CARD_VCCMASK) {
case 5:
sock_ctrl |= CBB_SOCKET_CTRL_VCC_5V;
break;
case 3:
sock_ctrl |= CBB_SOCKET_CTRL_VCC_3V;
break;
case XV:
sock_ctrl |= CBB_SOCKET_CTRL_VCC_XV;
break;
case YV:
sock_ctrl |= CBB_SOCKET_CTRL_VCC_YV;
break;
case 0:
break;
default:
return (0); /* power NEVER changed */
}
/* VPP == VCC */
sock_ctrl &= ~CBB_SOCKET_CTRL_VPPMASK;
sock_ctrl |= ((sock_ctrl >> 4) & 0x07);
if (cbb_get(sc, CBB_SOCKET_CONTROL) == sock_ctrl)
return (1); /* no change necessary */
DEVPRINTF((sc->dev, "cbb_power: %dV\n", volts));
if (volts != 0 && sc->chipset == CB_O2MICRO)
reg = cbb_o2micro_power_hack(sc);
cbb_set(sc, CBB_SOCKET_CONTROL, sock_ctrl);
status = cbb_get(sc, CBB_SOCKET_STATE);
/*
* XXX This busy wait is bogus. We should wait for a power
* interrupt and then whine if the status is bad. If we're
* worried about the card not coming up, then we should also
* schedule a timeout which we can cancel in the power interrupt.
*/
timeout = 20;
do {
DELAY(20*1000);
sockevent = cbb_get(sc, CBB_SOCKET_EVENT);
} while (!(sockevent & CBB_SOCKET_EVENT_POWER) && --timeout > 0);
/* reset event status */
/* XXX should only reset EVENT_POWER */
cbb_set(sc, CBB_SOCKET_EVENT, sockevent);
if (timeout < 0) {
printf ("VCC supply failed.\n");
goto done;
}
/* XXX
* delay 400 ms: thgough the standard defines that the Vcc set-up time
* is 20 ms, some PC-Card bridge requires longer duration.
* XXX Note: We should check the stutus AFTER the delay to give time
* for things to stabilize.
*/
DELAY(400*1000);
if (status & CBB_STATE_BAD_VCC_REQ) {
device_printf(sc->dev,
"bad Vcc request. ctrl=0x%x, status=0x%x\n",
sock_ctrl ,status);
printf("cbb_power: %dV\n", volts);
goto done;
}
retval = 1;
done:;
if (volts != 0 && sc->chipset == CB_O2MICRO)
cbb_o2micro_power_hack2(sc, reg);
return (retval);
}
/*
* detect the voltage for the card, and set it. Since the power
* used is the square of the voltage, lower voltages is a big win
* and what Windows does (and what Microsoft prefers). The MS paper
* also talks about preferring the CIS entry as well. In addition,
* we power up with OE disabled. We'll set it later in the power
* up sequence.
*/
static int
cbb_do_power(device_t brdev)
{
struct cbb_softc *sc = device_get_softc(brdev);
int voltage;
/* Don't enable OE */
exca_clrb(&sc->exca[0], EXCA_PWRCTL, EXCA_PWRCTL_OE);
/* Prefer lowest voltage supported */
voltage = cbb_detect_voltage(brdev);
cbb_power(brdev, CARD_OFF);
if (voltage & CARD_YV_CARD)
cbb_power(brdev, CARD_VCC(YV));
else if (voltage & CARD_XV_CARD)
cbb_power(brdev, CARD_VCC(XV));
else if (voltage & CARD_3V_CARD)
cbb_power(brdev, CARD_VCC(3));
else if (voltage & CARD_5V_CARD)
cbb_power(brdev, CARD_VCC(5));
else {
device_printf(brdev, "Unknown card voltage\n");
return (ENXIO);
}
return (0);
}
/************************************************************************/
/* CardBus power functions */
/************************************************************************/
static void
cbb_cardbus_reset(device_t brdev)
{
struct cbb_softc *sc = device_get_softc(brdev);
int delay_us;
delay_us = sc->chipset == CB_RF5C47X ? 400*1000 : 20*1000;
PCI_MASK_CONFIG(brdev, CBBR_BRIDGECTRL, |CBBM_BRIDGECTRL_RESET, 2);
DELAY(delay_us);
/* If a card exists, unreset it! */
if (CBB_CARD_PRESENT(cbb_get(sc, CBB_SOCKET_STATE))) {
PCI_MASK_CONFIG(brdev, CBBR_BRIDGECTRL,
&~CBBM_BRIDGECTRL_RESET, 2);
DELAY(delay_us);
}
}
static int
cbb_cardbus_power_enable_socket(device_t brdev, device_t child)
{
struct cbb_softc *sc = device_get_softc(brdev);
int err;
if (!CBB_CARD_PRESENT(cbb_get(sc, CBB_SOCKET_STATE)))
return (ENODEV);
err = cbb_do_power(brdev);
if (err)
return (err);
cbb_cardbus_reset(brdev);
return (0);
}
static void
cbb_cardbus_power_disable_socket(device_t brdev, device_t child)
{
cbb_power(brdev, CARD_OFF);
cbb_cardbus_reset(brdev);
}
/************************************************************************/
/* CardBus Resource */
/************************************************************************/
static int
cbb_cardbus_io_open(device_t brdev, int win, uint32_t start, uint32_t end)
{
int basereg;
int limitreg;
if ((win < 0) || (win > 1)) {
DEVPRINTF((brdev,
"cbb_cardbus_io_open: window out of range %d\n", win));
return (EINVAL);
}
basereg = win * 8 + CBBR_IOBASE0;
limitreg = win * 8 + CBBR_IOLIMIT0;
pci_write_config(brdev, basereg, start, 4);
pci_write_config(brdev, limitreg, end, 4);
return (0);
}
static int
cbb_cardbus_mem_open(device_t brdev, int win, uint32_t start, uint32_t end)
{
int basereg;
int limitreg;
if ((win < 0) || (win > 1)) {
DEVPRINTF((brdev,
"cbb_cardbus_mem_open: window out of range %d\n", win));
return (EINVAL);
}
basereg = win*8 + CBBR_MEMBASE0;
limitreg = win*8 + CBBR_MEMLIMIT0;
pci_write_config(brdev, basereg, start, 4);
pci_write_config(brdev, limitreg, end, 4);
return (0);
}
/*
* XXX The following function belongs in the pci bus layer.
*/
static void
cbb_cardbus_auto_open(struct cbb_softc *sc, int type)
{
uint32_t starts[2];
uint32_t ends[2];
struct cbb_reslist *rle;
int align;
int prefetchable[2];
uint32_t reg;
starts[0] = starts[1] = 0xffffffff;
ends[0] = ends[1] = 0;
if (type == SYS_RES_MEMORY)
align = CBB_MEMALIGN;
else if (type == SYS_RES_IOPORT)
align = CBB_IOALIGN;
else
align = 1;
/*
* This looks somewhat bogus, and doesn't seem to really respect
* alignment. The alignment stuff is happening too late (it
* should happen at allocation time, not activation time) and
* this code looks generally to be too complex for the purpose
* it surves.
*/
SLIST_FOREACH(rle, &sc->rl, link) {
if (rle->type != type)
;
else if (rle->res == NULL) {
device_printf(sc->dev, "WARNING: Resource not reserved? "
"(type=%d, addr=%lx)\n",
rle->type, rman_get_start(rle->res));
} else if (!(rman_get_flags(rle->res) & RF_ACTIVE)) {
/* XXX */
} else if (starts[0] == 0xffffffff) {
starts[0] = rman_get_start(rle->res);
ends[0] = rman_get_end(rle->res);
prefetchable[0] =
rman_get_flags(rle->res) & RF_PREFETCHABLE;
} else if (rman_get_end(rle->res) > ends[0] &&
rman_get_start(rle->res) - ends[0] <
CBB_AUTO_OPEN_SMALLHOLE && prefetchable[0] ==
(rman_get_flags(rle->res) & RF_PREFETCHABLE)) {
ends[0] = rman_get_end(rle->res);
} else if (rman_get_start(rle->res) < starts[0] &&
starts[0] - rman_get_end(rle->res) <
CBB_AUTO_OPEN_SMALLHOLE && prefetchable[0] ==
(rman_get_flags(rle->res) & RF_PREFETCHABLE)) {
starts[0] = rman_get_start(rle->res);
} else if (starts[1] == 0xffffffff) {
starts[1] = rman_get_start(rle->res);
ends[1] = rman_get_end(rle->res);
prefetchable[1] =
rman_get_flags(rle->res) & RF_PREFETCHABLE;
} else if (rman_get_end(rle->res) > ends[1] &&
rman_get_start(rle->res) - ends[1] <
CBB_AUTO_OPEN_SMALLHOLE && prefetchable[1] ==
(rman_get_flags(rle->res) & RF_PREFETCHABLE)) {
ends[1] = rman_get_end(rle->res);
} else if (rman_get_start(rle->res) < starts[1] &&
starts[1] - rman_get_end(rle->res) <
CBB_AUTO_OPEN_SMALLHOLE && prefetchable[1] ==
(rman_get_flags(rle->res) & RF_PREFETCHABLE)) {
starts[1] = rman_get_start(rle->res);
} else {
uint32_t diffs[2];
int win;
diffs[0] = diffs[1] = 0xffffffff;
if (rman_get_start(rle->res) > ends[0])
diffs[0] = rman_get_start(rle->res) - ends[0];
else if (rman_get_end(rle->res) < starts[0])
diffs[0] = starts[0] - rman_get_end(rle->res);
if (rman_get_start(rle->res) > ends[1])
diffs[1] = rman_get_start(rle->res) - ends[1];
else if (rman_get_end(rle->res) < starts[1])
diffs[1] = starts[1] - rman_get_end(rle->res);
win = (diffs[0] <= diffs[1])?0:1;
if (rman_get_start(rle->res) > ends[win])
ends[win] = rman_get_end(rle->res);
else if (rman_get_end(rle->res) < starts[win])
starts[win] = rman_get_start(rle->res);
if (!(rman_get_flags(rle->res) & RF_PREFETCHABLE))
prefetchable[win] = 0;
}
if (starts[0] != 0xffffffff)
starts[0] -= starts[0] % align;
if (starts[1] != 0xffffffff)
starts[1] -= starts[1] % align;
if (ends[0] % align != 0)
ends[0] += align - ends[0] % align - 1;
if (ends[1] % align != 0)
ends[1] += align - ends[1] % align - 1;
}
if (type == SYS_RES_MEMORY) {
cbb_cardbus_mem_open(sc->dev, 0, starts[0], ends[0]);
cbb_cardbus_mem_open(sc->dev, 1, starts[1], ends[1]);
reg = pci_read_config(sc->dev, CBBR_BRIDGECTRL, 2);
reg &= ~(CBBM_BRIDGECTRL_PREFETCH_0|
CBBM_BRIDGECTRL_PREFETCH_1);
reg |= (prefetchable[0]?CBBM_BRIDGECTRL_PREFETCH_0:0)|
(prefetchable[1]?CBBM_BRIDGECTRL_PREFETCH_1:0);
pci_write_config(sc->dev, CBBR_BRIDGECTRL, reg, 2);
} else if (type == SYS_RES_IOPORT) {
cbb_cardbus_io_open(sc->dev, 0, starts[0], ends[0]);
cbb_cardbus_io_open(sc->dev, 1, starts[1], ends[1]);
}
}
static int
cbb_cardbus_activate_resource(device_t brdev, device_t child, int type,
int rid, struct resource *res)
{
int ret;
ret = BUS_ACTIVATE_RESOURCE(device_get_parent(brdev), child,
type, rid, res);
if (ret != 0)
return (ret);
cbb_cardbus_auto_open(device_get_softc(brdev), type);
return (0);
}
static int
cbb_cardbus_deactivate_resource(device_t brdev, device_t child, int type,
int rid, struct resource *res)
{
int ret;
ret = BUS_DEACTIVATE_RESOURCE(device_get_parent(brdev), child,
type, rid, res);
if (ret != 0)
return (ret);
cbb_cardbus_auto_open(device_get_softc(brdev), type);
return (0);
}
static struct resource *
cbb_cardbus_alloc_resource(device_t brdev, device_t child, int type,
int *rid, u_long start, u_long end, u_long count, u_int flags)
{
struct cbb_softc *sc = device_get_softc(brdev);
int tmp;
struct resource *res;
u_long align;
switch (type) {
case SYS_RES_IRQ:
tmp = rman_get_start(sc->irq_res);
if (start > tmp || end < tmp || count != 1) {
device_printf(child, "requested interrupt %ld-%ld,"
"count = %ld not supported by cbb\n",
start, end, count);
return (NULL);
}
start = end = tmp;
flags |= RF_SHAREABLE;
break;
case SYS_RES_IOPORT:
if (start <= cbb_start_32_io)
start = cbb_start_32_io;
if (end < start)
end = start;
break;
case SYS_RES_MEMORY:
if (start <= cbb_start_mem)
start = cbb_start_mem;
if (end < start)
end = start;
if (count < CBB_MEMALIGN)
align = CBB_MEMALIGN;
else
align = count;
if (align > (1 << RF_ALIGNMENT(flags)))
flags = (flags & ~RF_ALIGNMENT_MASK) |
rman_make_alignment_flags(align);
break;
}
res = BUS_ALLOC_RESOURCE(device_get_parent(brdev), child, type, rid,
start, end, count, flags & ~RF_ACTIVE);
if (res == NULL) {
printf("cbb alloc res fail\n");
return (NULL);
}
cbb_insert_res(sc, res, type, *rid);
if (flags & RF_ACTIVE)
if (bus_activate_resource(child, type, *rid, res) != 0) {
bus_release_resource(child, type, *rid, res);
return (NULL);
}
return (res);
}
static int
cbb_cardbus_release_resource(device_t brdev, device_t child, int type,
int rid, struct resource *res)
{
struct cbb_softc *sc = device_get_softc(brdev);
int error;
if (rman_get_flags(res) & RF_ACTIVE) {
error = bus_deactivate_resource(child, type, rid, res);
if (error != 0)
return (error);
}
cbb_remove_res(sc, res);
return (BUS_RELEASE_RESOURCE(device_get_parent(brdev), child,
type, rid, res));
}
/************************************************************************/
/* PC Card Power Functions */
/************************************************************************/
static int
cbb_pcic_power_enable_socket(device_t brdev, device_t child)
{
struct cbb_softc *sc = device_get_softc(brdev);
int err;
DPRINTF(("cbb_pcic_socket_enable:\n"));
/* power down/up the socket to reset */
err = cbb_do_power(brdev);
if (err)
return (err);
exca_reset(&sc->exca[0], child);
return (0);
}
static void
cbb_pcic_power_disable_socket(device_t brdev, device_t child)
{
struct cbb_softc *sc = device_get_softc(brdev);
DPRINTF(("cbb_pcic_socket_disable\n"));
/* reset signal asserting... */
exca_clrb(&sc->exca[0], EXCA_INTR, EXCA_INTR_RESET);
DELAY(2*1000);
/* power down the socket */
cbb_power(brdev, CARD_OFF);
exca_clrb(&sc->exca[0], EXCA_PWRCTL, EXCA_PWRCTL_OE);
/* wait 300ms until power fails (Tpf). */
DELAY(300 * 1000);
}
/************************************************************************/
/* POWER methods */
/************************************************************************/
int
cbb_power_enable_socket(device_t brdev, device_t child)
{
struct cbb_softc *sc = device_get_softc(brdev);
if (sc->flags & CBB_16BIT_CARD)
return (cbb_pcic_power_enable_socket(brdev, child));
else
return (cbb_cardbus_power_enable_socket(brdev, child));
}
void
cbb_power_disable_socket(device_t brdev, device_t child)
{
struct cbb_softc *sc = device_get_softc(brdev);
if (sc->flags & CBB_16BIT_CARD)
cbb_pcic_power_disable_socket(brdev, child);
else
cbb_cardbus_power_disable_socket(brdev, child);
}
static int
cbb_pcic_activate_resource(device_t brdev, device_t child, int type, int rid,
struct resource *res)
{
struct cbb_softc *sc = device_get_softc(brdev);
return (exca_activate_resource(&sc->exca[0], child, type, rid, res));
}
static int
cbb_pcic_deactivate_resource(device_t brdev, device_t child, int type,
int rid, struct resource *res)
{
struct cbb_softc *sc = device_get_softc(brdev);
return (exca_deactivate_resource(&sc->exca[0], child, type, rid, res));
}
static struct resource *
cbb_pcic_alloc_resource(device_t brdev, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
struct resource *res = NULL;
struct cbb_softc *sc = device_get_softc(brdev);
int align;
int tmp;
switch (type) {
case SYS_RES_MEMORY:
if (start < cbb_start_mem)
start = cbb_start_mem;
if (end < start)
end = start;
if (count < CBB_MEMALIGN)
align = CBB_MEMALIGN;
else
align = count;
if (align > (1 << RF_ALIGNMENT(flags)))
flags = (flags & ~RF_ALIGNMENT_MASK) |
rman_make_alignment_flags(align);
break;
case SYS_RES_IOPORT:
if (start < cbb_start_16_io)
start = cbb_start_16_io;
if (end < start)
end = start;
break;
case SYS_RES_IRQ:
tmp = rman_get_start(sc->irq_res);
if (start > tmp || end < tmp || count != 1) {
device_printf(child, "requested interrupt %ld-%ld,"
"count = %ld not supported by cbb\n",
start, end, count);
return (NULL);
}
flags |= RF_SHAREABLE;
start = end = rman_get_start(sc->irq_res);
break;
}
res = BUS_ALLOC_RESOURCE(device_get_parent(brdev), child, type, rid,
start, end, count, flags & ~RF_ACTIVE);
if (res == NULL)
return (NULL);
cbb_insert_res(sc, res, type, *rid);
if (flags & RF_ACTIVE) {
if (bus_activate_resource(child, type, *rid, res) != 0) {
bus_release_resource(child, type, *rid, res);
return (NULL);
}
}
return (res);
}
static int
cbb_pcic_release_resource(device_t brdev, device_t child, int type,
int rid, struct resource *res)
{
struct cbb_softc *sc = device_get_softc(brdev);
int error;
if (rman_get_flags(res) & RF_ACTIVE) {
error = bus_deactivate_resource(child, type, rid, res);
if (error != 0)
return (error);
}
cbb_remove_res(sc, res);
return (BUS_RELEASE_RESOURCE(device_get_parent(brdev), child,
type, rid, res));
}
/************************************************************************/
/* PC Card methods */
/************************************************************************/
int
cbb_pcic_set_res_flags(device_t brdev, device_t child, int type, int rid,
uint32_t flags)
{
struct cbb_softc *sc = device_get_softc(brdev);
struct resource *res;
if (type != SYS_RES_MEMORY)
return (EINVAL);
res = cbb_find_res(sc, type, rid);
if (res == NULL) {
device_printf(brdev,
"set_res_flags: specified rid not found\n");
return (ENOENT);
}
return (exca_mem_set_flags(&sc->exca[0], res, flags));
}
int
cbb_pcic_set_memory_offset(device_t brdev, device_t child, int rid,
uint32_t cardaddr, uint32_t *deltap)
{
struct cbb_softc *sc = device_get_softc(brdev);
struct resource *res;
res = cbb_find_res(sc, SYS_RES_MEMORY, rid);
if (res == NULL) {
device_printf(brdev,
"set_memory_offset: specified rid not found\n");
return (ENOENT);
}
return (exca_mem_set_offset(&sc->exca[0], res, cardaddr, deltap));
}
/************************************************************************/
/* BUS Methods */
/************************************************************************/
int
cbb_activate_resource(device_t brdev, device_t child, int type, int rid,
struct resource *r)
{
struct cbb_softc *sc = device_get_softc(brdev);
if (sc->flags & CBB_16BIT_CARD)
return (cbb_pcic_activate_resource(brdev, child, type, rid, r));
else
return (cbb_cardbus_activate_resource(brdev, child, type, rid,
r));
}
int
cbb_deactivate_resource(device_t brdev, device_t child, int type,
int rid, struct resource *r)
{
struct cbb_softc *sc = device_get_softc(brdev);
if (sc->flags & CBB_16BIT_CARD)
return (cbb_pcic_deactivate_resource(brdev, child, type,
rid, r));
else
return (cbb_cardbus_deactivate_resource(brdev, child, type,
rid, r));
}
struct resource *
cbb_alloc_resource(device_t brdev, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
struct cbb_softc *sc = device_get_softc(brdev);
if (sc->flags & CBB_16BIT_CARD)
return (cbb_pcic_alloc_resource(brdev, child, type, rid,
start, end, count, flags));
else
return (cbb_cardbus_alloc_resource(brdev, child, type, rid,
start, end, count, flags));
}
int
cbb_release_resource(device_t brdev, device_t child, int type, int rid,
struct resource *r)
{
struct cbb_softc *sc = device_get_softc(brdev);
if (sc->flags & CBB_16BIT_CARD)
return (cbb_pcic_release_resource(brdev, child, type,
rid, r));
else
return (cbb_cardbus_release_resource(brdev, child, type,
rid, r));
}
int
cbb_read_ivar(device_t brdev, device_t child, int which, uintptr_t *result)
{
struct cbb_softc *sc = device_get_softc(brdev);
switch (which) {
case PCIB_IVAR_BUS:
*result = sc->secbus;
return (0);
}
return (ENOENT);
}
int
cbb_write_ivar(device_t brdev, device_t child, int which, uintptr_t value)
{
struct cbb_softc *sc = device_get_softc(brdev);
switch (which) {
case PCIB_IVAR_BUS:
sc->secbus = value;
break;
}
return (ENOENT);
}
/************************************************************************/
/* PCI compat methods */
/************************************************************************/
int
cbb_maxslots(device_t brdev)
{
return (0);
}
uint32_t
cbb_read_config(device_t brdev, int b, int s, int f, int reg, int width)
{
uint32_t rv;
/*
* Pass through to the next ppb up the chain (i.e. our grandparent).
*/
rv = PCIB_READ_CONFIG(device_get_parent(device_get_parent(brdev)),
b, s, f, reg, width);
return (rv);
}
void
cbb_write_config(device_t brdev, int b, int s, int f, int reg, uint32_t val,
int width)
{
/*
* Pass through to the next ppb up the chain (i.e. our grandparent).
*/
PCIB_WRITE_CONFIG(device_get_parent(device_get_parent(brdev)),
b, s, f, reg, val, width);
}
int
cbb_suspend(device_t self)
{
int error = 0;
struct cbb_softc *sc = device_get_softc(self);
cbb_set(sc, CBB_SOCKET_MASK, 0); /* Quiet hardware */
bus_teardown_intr(self, sc->irq_res, sc->intrhand);
sc->flags &= ~CBB_CARD_OK; /* Card is bogus now */
error = bus_generic_suspend(self);
return (error);
}
int
cbb_resume(device_t self)
{
int error = 0;
struct cbb_softc *sc = (struct cbb_softc *)device_get_softc(self);
uint32_t tmp;
/*
* Some BIOSes will not save the BARs for the pci chips, so we
* must do it ourselves. If the BAR is reset to 0 for an I/O
* device, it will read back as 0x1, so no explicit test for
* memory devices are needed.
*
* Note: The PCI bus code should do this automatically for us on
* suspend/resume, but until it does, we have to cope.
*/
pci_write_config(self, CBBR_SOCKBASE, rman_get_start(sc->base_res), 4);
DEVPRINTF((self, "PCI Memory allocated: %08lx\n",
rman_get_start(sc->base_res)));
sc->chipinit(sc);
/* reset interrupt -- Do we really need to do this? */
tmp = cbb_get(sc, CBB_SOCKET_EVENT);
cbb_set(sc, CBB_SOCKET_EVENT, tmp);
/* re-establish the interrupt. */
if (bus_setup_intr(self, sc->irq_res, INTR_TYPE_AV | INTR_MPSAFE,
cbb_intr, sc, &sc->intrhand)) {
device_printf(self, "couldn't re-establish interrupt");
bus_release_resource(self, SYS_RES_IRQ, 0, sc->irq_res);
bus_release_resource(self, SYS_RES_MEMORY, CBBR_SOCKBASE,
sc->base_res);
sc->irq_res = NULL;
sc->base_res = NULL;
return (ENOMEM);
}
/* CSC Interrupt: Card detect interrupt on */
cbb_setb(sc, CBB_SOCKET_MASK, CBB_SOCKET_MASK_CD);
/* Signal the thread to wakeup. */
mtx_lock(&sc->mtx);
cv_signal(&sc->cv);
mtx_unlock(&sc->mtx);
error = bus_generic_resume(self);
return (error);
}
int
cbb_child_present(device_t self)
{
struct cbb_softc *sc = (struct cbb_softc *)device_get_softc(self);
uint32_t sockstate;
sockstate = cbb_get(sc, CBB_SOCKET_STATE);
return (CBB_CARD_PRESENT(sockstate) &&
(sc->flags & CBB_CARD_OK) == CBB_CARD_OK);
}
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