freebsd-skq/sys/dev/ath/if_ath_ahb.c
adrian 1fb84703f7 Fix ath_ahb(4) bus attach and eeprom error handling.
Submitted by:	Luiz Otavio O Souza <loos.br@gmail.com>
2011-06-13 04:31:57 +00:00

292 lines
7.9 KiB
C

/*-
* Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
* Copyright (c) 2010-2011 Adrian Chadd, Xenion Pty Ltd
* 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.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
* redistribution must be conditioned upon including a substantially
* similar Disclaimer requirement for further binary redistribution.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* AHB bus front-end for the Atheros Wireless LAN controller driver.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/module.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/errno.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_media.h>
#include <net/if_arp.h>
#include <net80211/ieee80211_var.h>
#include <dev/ath/if_athvar.h>
#include <mips/atheros/ar71xxreg.h>
#include <mips/atheros/ar91xxreg.h>
#include <mips/atheros/ar71xx_cpudef.h>
/*
* bus glue.
*/
/* number of 16 bit words */
#define ATH_EEPROM_DATA_SIZE 2048
struct ath_ahb_softc {
struct ath_softc sc_sc;
struct resource *sc_sr; /* memory resource */
struct resource *sc_irq; /* irq resource */
struct resource *sc_eeprom; /* eeprom location */
void *sc_ih; /* interrupt handler */
};
#define VENDOR_ATHEROS 0x168c
#define AR9130_DEVID 0x000b
static int
ath_ahb_probe(device_t dev)
{
const char* devname;
/* Atheros / ar9130 */
devname = ath_hal_probe(VENDOR_ATHEROS, AR9130_DEVID);
if (devname != NULL) {
device_set_desc(dev, devname);
return BUS_PROBE_DEFAULT;
}
return ENXIO;
}
static int
ath_ahb_attach(device_t dev)
{
struct ath_ahb_softc *psc = device_get_softc(dev);
struct ath_softc *sc = &psc->sc_sc;
int error = ENXIO;
int rid;
long eepromaddr;
uint8_t *p;
sc->sc_dev = dev;
rid = 0;
psc->sc_sr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
if (psc->sc_sr == NULL) {
device_printf(dev, "cannot map register space\n");
goto bad;
}
if (resource_long_value(device_get_name(dev), device_get_unit(dev),
"eepromaddr", &eepromaddr) != 0) {
device_printf(dev, "cannot fetch 'eepromaddr' from hints\n");
goto bad0;
}
rid = 0;
device_printf(sc->sc_dev, "eeprom @ %p\n", (void *) eepromaddr);
psc->sc_eeprom = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, (uintptr_t) eepromaddr,
(uintptr_t) eepromaddr + (uintptr_t) ((ATH_EEPROM_DATA_SIZE * 2) - 1), 0, RF_ACTIVE);
if (psc->sc_eeprom == NULL) {
device_printf(dev, "cannot map eeprom space\n");
goto bad0;
}
/* XXX uintptr_t is a bandaid for ia64; to be fixed */
sc->sc_st = (HAL_BUS_TAG)(uintptr_t) rman_get_bustag(psc->sc_sr);
sc->sc_sh = (HAL_BUS_HANDLE) rman_get_bushandle(psc->sc_sr);
/*
* Mark device invalid so any interrupts (shared or otherwise)
* that arrive before the HAL is setup are discarded.
*/
sc->sc_invalid = 1;
/* Copy the EEPROM data out */
sc->sc_eepromdata = malloc(ATH_EEPROM_DATA_SIZE * 2, M_TEMP, M_NOWAIT | M_ZERO);
if (sc->sc_eepromdata == NULL) {
device_printf(dev, "cannot allocate memory for eeprom data\n");
goto bad1;
}
device_printf(sc->sc_dev, "eeprom data @ %p\n", (void *) rman_get_bushandle(psc->sc_eeprom));
/* XXX why doesn't this work? -adrian */
#if 0
bus_space_read_multi_1(
rman_get_bustag(psc->sc_eeprom),
rman_get_bushandle(psc->sc_eeprom),
0, (u_int8_t *) sc->sc_eepromdata, ATH_EEPROM_DATA_SIZE * 2);
#endif
p = (void *) rman_get_bushandle(psc->sc_eeprom);
memcpy(sc->sc_eepromdata, p, ATH_EEPROM_DATA_SIZE * 2);
/*
* Arrange interrupt line.
*/
rid = 0;
psc->sc_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_SHAREABLE|RF_ACTIVE);
if (psc->sc_irq == NULL) {
device_printf(dev, "could not map interrupt\n");
goto bad1;
}
if (bus_setup_intr(dev, psc->sc_irq,
INTR_TYPE_NET | INTR_MPSAFE,
NULL, ath_intr, sc, &psc->sc_ih)) {
device_printf(dev, "could not establish interrupt\n");
goto bad2;
}
/*
* Setup DMA descriptor area.
*/
if (bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */
1, 0, /* alignment, bounds */
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
0x3ffff, /* maxsize XXX */
ATH_MAX_SCATTER, /* nsegments */
0x3ffff, /* maxsegsize XXX */
BUS_DMA_ALLOCNOW, /* flags */
NULL, /* lockfunc */
NULL, /* lockarg */
&sc->sc_dmat)) {
device_printf(dev, "cannot allocate DMA tag\n");
goto bad3;
}
ATH_LOCK_INIT(sc);
error = ath_attach(AR9130_DEVID, sc);
if (error == 0) /* success */
return 0;
ATH_LOCK_DESTROY(sc);
bus_dma_tag_destroy(sc->sc_dmat);
bad3:
bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih);
bad2:
bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq);
bad1:
bus_release_resource(dev, SYS_RES_MEMORY, 0, psc->sc_eeprom);
bad0:
bus_release_resource(dev, SYS_RES_MEMORY, 0, psc->sc_sr);
bad:
/* XXX?! */
if (sc->sc_eepromdata)
free(sc->sc_eepromdata, M_TEMP);
return (error);
}
static int
ath_ahb_detach(device_t dev)
{
struct ath_ahb_softc *psc = device_get_softc(dev);
struct ath_softc *sc = &psc->sc_sc;
/* check if device was removed */
sc->sc_invalid = !bus_child_present(dev);
ath_detach(sc);
bus_generic_detach(dev);
bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih);
bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq);
bus_dma_tag_destroy(sc->sc_dmat);
bus_release_resource(dev, SYS_RES_MEMORY, 0, psc->sc_sr);
bus_release_resource(dev, SYS_RES_MEMORY, 0, psc->sc_eeprom);
/* XXX?! */
if (sc->sc_eepromdata)
free(sc->sc_eepromdata, M_TEMP);
ATH_LOCK_DESTROY(sc);
return (0);
}
static int
ath_ahb_shutdown(device_t dev)
{
struct ath_ahb_softc *psc = device_get_softc(dev);
ath_shutdown(&psc->sc_sc);
return (0);
}
static int
ath_ahb_suspend(device_t dev)
{
struct ath_ahb_softc *psc = device_get_softc(dev);
ath_suspend(&psc->sc_sc);
return (0);
}
static int
ath_ahb_resume(device_t dev)
{
struct ath_ahb_softc *psc = device_get_softc(dev);
ath_resume(&psc->sc_sc);
return (0);
}
static device_method_t ath_ahb_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, ath_ahb_probe),
DEVMETHOD(device_attach, ath_ahb_attach),
DEVMETHOD(device_detach, ath_ahb_detach),
DEVMETHOD(device_shutdown, ath_ahb_shutdown),
DEVMETHOD(device_suspend, ath_ahb_suspend),
DEVMETHOD(device_resume, ath_ahb_resume),
{ 0,0 }
};
static driver_t ath_ahb_driver = {
"ath",
ath_ahb_methods,
sizeof (struct ath_ahb_softc)
};
static devclass_t ath_devclass;
DRIVER_MODULE(ath, nexus, ath_ahb_driver, ath_devclass, 0, 0);
MODULE_VERSION(ath, 1);
MODULE_DEPEND(ath, wlan, 1, 1, 1); /* 802.11 media layer */
MODULE_DEPEND(ath, if_ath, 1, 1, 1); /* if_ath driver */