FreeBSD-5.3/sys/dev/cardbus/cardbus.c
/*
* Copyright (c) 2003 M. Warner Losh. All Rights Reserved.
* 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,
* without modification, immediately at the beginning of the file.
* 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: src/sys/dev/cardbus/cardbus.c,v 1.44 2004/06/27 13:07:02 imp Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <machine/resource.h>
#include <sys/pciio.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pci_private.h>
#include <dev/cardbus/cardbusreg.h>
#include <dev/cardbus/cardbusvar.h>
#include <dev/cardbus/cardbus_cis.h>
#include <dev/pccard/pccardvar.h>
#include "power_if.h"
#include "pcib_if.h"
/* sysctl vars */
SYSCTL_NODE(_hw, OID_AUTO, cardbus, CTLFLAG_RD, 0, "CardBus parameters");
int cardbus_debug = 0;
TUNABLE_INT("hw.cardbus.debug", &cardbus_debug);
SYSCTL_INT(_hw_cardbus, OID_AUTO, debug, CTLFLAG_RW,
&cardbus_debug, 0,
"CardBus debug");
int cardbus_cis_debug = 0;
TUNABLE_INT("hw.cardbus.cis_debug", &cardbus_cis_debug);
SYSCTL_INT(_hw_cardbus, OID_AUTO, cis_debug, CTLFLAG_RW,
&cardbus_cis_debug, 0,
"CardBus CIS debug");
#define DPRINTF(a) if (cardbus_debug) printf a
#define DEVPRINTF(x) if (cardbus_debug) device_printf x
static int cardbus_attach(device_t cbdev);
static int cardbus_attach_card(device_t cbdev);
static int cardbus_detach(device_t cbdev);
static int cardbus_detach_card(device_t cbdev);
static void cardbus_device_setup_regs(device_t brdev, int b, int s, int f,
pcicfgregs *cfg);
static void cardbus_driver_added(device_t cbdev, driver_t *driver);
static int cardbus_probe(device_t cbdev);
static int cardbus_read_ivar(device_t cbdev, device_t child, int which,
uintptr_t *result);
static void cardbus_release_all_resources(device_t cbdev,
struct cardbus_devinfo *dinfo);
static int cardbus_write_ivar(device_t cbdev, device_t child, int which,
uintptr_t value);
/************************************************************************/
/* Probe/Attach */
/************************************************************************/
static int
cardbus_probe(device_t cbdev)
{
device_set_desc(cbdev, "CardBus bus");
return 0;
}
static int
cardbus_attach(device_t cbdev)
{
return 0;
}
static int
cardbus_detach(device_t cbdev)
{
cardbus_detach_card(cbdev);
return 0;
}
static int
cardbus_suspend(device_t self)
{
cardbus_detach_card(self);
return (0);
}
static int
cardbus_resume(device_t self)
{
return (0);
}
/************************************************************************/
/* Attach/Detach card */
/************************************************************************/
static void
cardbus_device_setup_regs(device_t brdev, int b, int s, int f, pcicfgregs *cfg)
{
PCIB_WRITE_CONFIG(brdev, b, s, f, PCIR_INTLINE,
pci_get_irq(device_get_parent(brdev)), 1);
cfg->intline = PCIB_READ_CONFIG(brdev, b, s, f, PCIR_INTLINE, 1);
PCIB_WRITE_CONFIG(brdev, b, s, f, PCIR_CACHELNSZ, 0x08, 1);
cfg->cachelnsz = PCIB_READ_CONFIG(brdev, b, s, f, PCIR_CACHELNSZ, 1);
PCIB_WRITE_CONFIG(brdev, b, s, f, PCIR_LATTIMER, 0xa8, 1);
cfg->lattimer = PCIB_READ_CONFIG(brdev, b, s, f, PCIR_LATTIMER, 1);
PCIB_WRITE_CONFIG(brdev, b, s, f, PCIR_MINGNT, 0x14, 1);
cfg->mingnt = PCIB_READ_CONFIG(brdev, b, s, f, PCIR_MINGNT, 1);
PCIB_WRITE_CONFIG(brdev, b, s, f, PCIR_MAXLAT, 0x14, 1);
cfg->maxlat = PCIB_READ_CONFIG(brdev, b, s, f, PCIR_MAXLAT, 1);
}
static int
cardbus_attach_card(device_t cbdev)
{
device_t brdev = device_get_parent(cbdev);
int cardattached = 0;
int bus, slot, func;
cardbus_detach_card(cbdev); /* detach existing cards */
POWER_ENABLE_SOCKET(brdev, cbdev);
bus = pcib_get_bus(cbdev);
/* For each function, set it up and try to attach a driver to it */
for (slot = 0; slot <= CARDBUS_SLOTMAX; slot++) {
int cardbusfunchigh = 0;
for (func = 0; func <= cardbusfunchigh; func++) {
struct cardbus_devinfo *dinfo;
dinfo = (struct cardbus_devinfo *)
pci_read_device(brdev, bus, slot, func,
sizeof(struct cardbus_devinfo));
if (dinfo == NULL)
continue;
if (dinfo->pci.cfg.mfdev)
cardbusfunchigh = CARDBUS_FUNCMAX;
cardbus_device_setup_regs(brdev, bus, slot, func,
&dinfo->pci.cfg);
dinfo->pci.cfg.dev = device_add_child(cbdev, NULL, -1);
if (!dinfo->pci.cfg.dev) {
DEVPRINTF((cbdev, "Cannot add child!\n"));
pci_freecfg((struct pci_devinfo *)dinfo);
continue;
}
resource_list_init(&dinfo->pci.resources);
device_set_ivars(dinfo->pci.cfg.dev, dinfo);
cardbus_do_cis(cbdev, dinfo->pci.cfg.dev);
pci_print_verbose(&dinfo->pci);
if (device_probe_and_attach(dinfo->pci.cfg.dev) != 0)
cardbus_release_all_resources(cbdev, dinfo);
else
cardattached++;
}
}
if (cardattached > 0)
return (0);
POWER_DISABLE_SOCKET(brdev, cbdev);
return (ENOENT);
}
static int
cardbus_detach_card(device_t cbdev)
{
int numdevs;
device_t *devlist;
int tmp;
int err = 0;
device_get_children(cbdev, &devlist, &numdevs);
if (numdevs == 0) {
free(devlist, M_TEMP);
return (ENOENT);
}
for (tmp = 0; tmp < numdevs; tmp++) {
struct cardbus_devinfo *dinfo = device_get_ivars(devlist[tmp]);
int status = device_get_state(devlist[tmp]);
if (dinfo->pci.cfg.dev != devlist[tmp])
device_printf(cbdev, "devinfo dev mismatch\n");
if (status == DS_ATTACHED || status == DS_BUSY)
device_detach(devlist[tmp]);
cardbus_release_all_resources(cbdev, dinfo);
device_delete_child(cbdev, devlist[tmp]);
pci_freecfg((struct pci_devinfo *)dinfo);
}
POWER_DISABLE_SOCKET(device_get_parent(cbdev), cbdev);
free(devlist, M_TEMP);
return (err);
}
static void
cardbus_driver_added(device_t cbdev, driver_t *driver)
{
int numdevs;
device_t *devlist;
device_t dev;
int i;
struct cardbus_devinfo *dinfo;
DEVICE_IDENTIFY(driver, cbdev);
device_get_children(cbdev, &devlist, &numdevs);
/*
* If there are no drivers attached, but there are children,
* then power the card up.
*/
for (i = 0; i < numdevs; i++) {
dev = devlist[i];
if (device_get_state(dev) != DS_NOTPRESENT)
break;
}
if (i > 0 && i == numdevs)
POWER_ENABLE_SOCKET(device_get_parent(cbdev), cbdev);
for (i = 0; i < numdevs; i++) {
dev = devlist[i];
if (device_get_state(dev) != DS_NOTPRESENT)
continue;
dinfo = device_get_ivars(dev);
pci_print_verbose(&dinfo->pci);
resource_list_init(&dinfo->pci.resources);
cardbus_do_cis(cbdev, dev);
if (device_probe_and_attach(dev) != 0)
cardbus_release_all_resources(cbdev, dinfo);
}
free(devlist, M_TEMP);
}
static void
cardbus_release_all_resources(device_t cbdev, struct cardbus_devinfo *dinfo)
{
struct resource_list_entry *rle;
/* Free all allocated resources */
SLIST_FOREACH(rle, &dinfo->pci.resources, link) {
if (rle->res) {
if (rman_get_device(rle->res) != cbdev)
device_printf(cbdev, "release_all_resource: "
"Resource still owned by child, oops. "
"(type=%d, rid=%d, addr=%lx)\n",
rle->type, rle->rid,
rman_get_start(rle->res));
BUS_RELEASE_RESOURCE(device_get_parent(cbdev),
cbdev, rle->type, rle->rid, rle->res);
rle->res = NULL;
/*
* zero out config so the card won't acknowledge
* access to the space anymore
*/
pci_write_config(dinfo->pci.cfg.dev, rle->rid, 0, 4);
}
}
resource_list_free(&dinfo->pci.resources);
}
/************************************************************************/
/* Other Bus Methods */
/************************************************************************/
static int
cardbus_read_ivar(device_t cbdev, device_t child, int which, uintptr_t *result)
{
struct cardbus_devinfo *dinfo;
pcicfgregs *cfg;
dinfo = device_get_ivars(child);
cfg = &dinfo->pci.cfg;
switch (which) {
case PCI_IVAR_ETHADDR:
/*
* The generic accessor doesn't deal with failure, so
* we set the return value, then return an error.
*/
if ((dinfo->fepresent & (1 << TPL_FUNCE_LAN_NID)) == 0) {
*((uint8_t **) result) = NULL;
return (EINVAL);
}
*((uint8_t **) result) = dinfo->funce.lan.nid;
break;
default:
return (pci_read_ivar(cbdev, child, which, result));
}
return 0;
}
static int
cardbus_write_ivar(device_t cbdev, device_t child, int which, uintptr_t value)
{
return(pci_write_ivar(cbdev, child, which, value));
}
static device_method_t cardbus_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, cardbus_probe),
DEVMETHOD(device_attach, cardbus_attach),
DEVMETHOD(device_detach, cardbus_detach),
DEVMETHOD(device_suspend, cardbus_suspend),
DEVMETHOD(device_resume, cardbus_resume),
/* Bus interface */
DEVMETHOD(bus_read_ivar, cardbus_read_ivar),
DEVMETHOD(bus_write_ivar, cardbus_write_ivar),
DEVMETHOD(bus_driver_added, cardbus_driver_added),
/* Card Interface */
DEVMETHOD(card_attach_card, cardbus_attach_card),
DEVMETHOD(card_detach_card, cardbus_detach_card),
{0,0}
};
DECLARE_CLASS(pci_driver);
DEFINE_CLASS_1(cardbus, cardbus_driver, cardbus_methods, 0, pci_driver);
static devclass_t cardbus_devclass;
DRIVER_MODULE(cardbus, cbb, cardbus_driver, cardbus_devclass, 0, 0);
MODULE_VERSION(cardbus, 1);