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freebsd/sys/dev/ral/if_ral_pci.c
Marius Strobl 97db2528ed - Add support for using MSI instead of INTx, controllable via the tunable 
hw.ral.msi_disable (defaulting to using MSI).
- Probe with BUS_PROBE_DEFAULT instead of 0.
- Nuke code setting PCI_POWERSTATE_D0; pci(4) already does that for type 0
  devices.
- Use PCIR_BAR instead of a homegrown macro.
- There's no need to keep track of resource IDs.
- Release resources again in case attaching fails.
- Quiesce the interrupt before detaching.
- Sprinkle const.
- Use DEVMETHOD_END.
- Use NULL instead of 0 for pointers.
- Trim headers.
- Nuke dupe $FreeBSD$.

MFC after:	1 week
2013-12-29 22:43:14 +00:00

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/*-
* Copyright (c) 2005, 2006
* Damien Bergamini <damien.bergamini@free.fr>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* PCI/Cardbus front-end for the Ralink RT2560/RT2561/RT2561S/RT2661 driver.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/rman.h>
#include <sys/socket.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_media.h>
#include <net/route.h>
#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_radiotap.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/ral/rt2560var.h>
#include <dev/ral/rt2661var.h>
#include <dev/ral/rt2860var.h>
MODULE_DEPEND(ral, pci, 1, 1, 1);
MODULE_DEPEND(ral, firmware, 1, 1, 1);
MODULE_DEPEND(ral, wlan, 1, 1, 1);
MODULE_DEPEND(ral, wlan_amrr, 1, 1, 1);
static int ral_msi_disable;
TUNABLE_INT("hw.ral.msi_disable", &ral_msi_disable);
struct ral_pci_ident {
uint16_t vendor;
uint16_t device;
const char *name;
};
static const struct ral_pci_ident ral_pci_ids[] = {
{ 0x1432, 0x7708, "Edimax RT2860" },
{ 0x1432, 0x7711, "Edimax RT3591" },
{ 0x1432, 0x7722, "Edimax RT3591" },
{ 0x1432, 0x7727, "Edimax RT2860" },
{ 0x1432, 0x7728, "Edimax RT2860" },
{ 0x1432, 0x7738, "Edimax RT2860" },
{ 0x1432, 0x7748, "Edimax RT2860" },
{ 0x1432, 0x7758, "Edimax RT2860" },
{ 0x1432, 0x7768, "Edimax RT2860" },
{ 0x1462, 0x891a, "MSI RT3090" },
{ 0x1814, 0x0201, "Ralink Technology RT2560" },
{ 0x1814, 0x0301, "Ralink Technology RT2561S" },
{ 0x1814, 0x0302, "Ralink Technology RT2561" },
{ 0x1814, 0x0401, "Ralink Technology RT2661" },
{ 0x1814, 0x0601, "Ralink Technology RT2860" },
{ 0x1814, 0x0681, "Ralink Technology RT2890" },
{ 0x1814, 0x0701, "Ralink Technology RT2760" },
{ 0x1814, 0x0781, "Ralink Technology RT2790" },
{ 0x1814, 0x3060, "Ralink Technology RT3060" },
{ 0x1814, 0x3062, "Ralink Technology RT3062" },
{ 0x1814, 0x3090, "Ralink Technology RT3090" },
{ 0x1814, 0x3091, "Ralink Technology RT3091" },
{ 0x1814, 0x3092, "Ralink Technology RT3092" },
{ 0x1814, 0x3390, "Ralink Technology RT3390" },
{ 0x1814, 0x3562, "Ralink Technology RT3562" },
{ 0x1814, 0x3592, "Ralink Technology RT3592" },
{ 0x1814, 0x3593, "Ralink Technology RT3593" },
{ 0x1814, 0x5390, "Ralink Technology RT5390" },
{ 0x1814, 0x539a, "Ralink Technology RT5390" },
{ 0x1814, 0x539f, "Ralink Technology RT5390" },
{ 0x1a3b, 0x1059, "AWT RT2890" },
{ 0, 0, NULL }
};
static const struct ral_opns {
int (*attach)(device_t, int);
int (*detach)(void *);
void (*shutdown)(void *);
void (*suspend)(void *);
void (*resume)(void *);
void (*intr)(void *);
} ral_rt2560_opns = {
rt2560_attach,
rt2560_detach,
rt2560_stop,
rt2560_stop,
rt2560_resume,
rt2560_intr
}, ral_rt2661_opns = {
rt2661_attach,
rt2661_detach,
rt2661_shutdown,
rt2661_suspend,
rt2661_resume,
rt2661_intr
}, ral_rt2860_opns = {
rt2860_attach,
rt2860_detach,
rt2860_shutdown,
rt2860_suspend,
rt2860_resume,
rt2860_intr
};
struct ral_pci_softc {
union {
struct rt2560_softc sc_rt2560;
struct rt2661_softc sc_rt2661;
struct rt2860_softc sc_rt2860;
} u;
const struct ral_opns *sc_opns;
struct resource *irq;
struct resource *mem;
void *sc_ih;
};
static int ral_pci_probe(device_t);
static int ral_pci_attach(device_t);
static int ral_pci_detach(device_t);
static int ral_pci_shutdown(device_t);
static int ral_pci_suspend(device_t);
static int ral_pci_resume(device_t);
static device_method_t ral_pci_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, ral_pci_probe),
DEVMETHOD(device_attach, ral_pci_attach),
DEVMETHOD(device_detach, ral_pci_detach),
DEVMETHOD(device_shutdown, ral_pci_shutdown),
DEVMETHOD(device_suspend, ral_pci_suspend),
DEVMETHOD(device_resume, ral_pci_resume),
DEVMETHOD_END
};
static driver_t ral_pci_driver = {
"ral",
ral_pci_methods,
sizeof (struct ral_pci_softc)
};
static devclass_t ral_devclass;
DRIVER_MODULE(ral, pci, ral_pci_driver, ral_devclass, NULL, NULL);
static int
ral_pci_probe(device_t dev)
{
const struct ral_pci_ident *ident;
for (ident = ral_pci_ids; ident->name != NULL; ident++) {
if (pci_get_vendor(dev) == ident->vendor &&
pci_get_device(dev) == ident->device) {
device_set_desc(dev, ident->name);
return (BUS_PROBE_DEFAULT);
}
}
return ENXIO;
}
static int
ral_pci_attach(device_t dev)
{
struct ral_pci_softc *psc = device_get_softc(dev);
struct rt2560_softc *sc = &psc->u.sc_rt2560;
int count, error, rid;
pci_enable_busmaster(dev);
switch (pci_get_device(dev)) {
case 0x0201:
psc->sc_opns = &ral_rt2560_opns;
break;
case 0x0301:
case 0x0302:
case 0x0401:
psc->sc_opns = &ral_rt2661_opns;
break;
default:
psc->sc_opns = &ral_rt2860_opns;
break;
}
rid = PCIR_BAR(0);
psc->mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE);
if (psc->mem == NULL) {
device_printf(dev, "could not allocate memory resource\n");
return ENXIO;
}
sc->sc_st = rman_get_bustag(psc->mem);
sc->sc_sh = rman_get_bushandle(psc->mem);
sc->sc_invalid = 1;
rid = 0;
if (ral_msi_disable == 0) {
count = 1;
if (pci_alloc_msi(dev, &count) == 0)
rid = 1;
}
psc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE |
(rid != 0 ? 0 : RF_SHAREABLE));
if (psc->irq == NULL) {
device_printf(dev, "could not allocate interrupt resource\n");
pci_release_msi(dev);
bus_release_resource(dev, SYS_RES_MEMORY,
rman_get_rid(psc->mem), psc->mem);
return ENXIO;
}
error = (*psc->sc_opns->attach)(dev, pci_get_device(dev));
if (error != 0) {
(void)ral_pci_detach(dev);
return error;
}
/*
* Hook our interrupt after all initialization is complete.
*/
error = bus_setup_intr(dev, psc->irq, INTR_TYPE_NET | INTR_MPSAFE,
NULL, psc->sc_opns->intr, psc, &psc->sc_ih);
if (error != 0) {
device_printf(dev, "could not set up interrupt\n");
(void)ral_pci_detach(dev);
return error;
}
sc->sc_invalid = 0;
return 0;
}
static int
ral_pci_detach(device_t dev)
{
struct ral_pci_softc *psc = device_get_softc(dev);
struct rt2560_softc *sc = &psc->u.sc_rt2560;
/* check if device was removed */
sc->sc_invalid = !bus_child_present(dev);
if (psc->sc_ih != NULL)
bus_teardown_intr(dev, psc->irq, psc->sc_ih);
(*psc->sc_opns->detach)(psc);
bus_generic_detach(dev);
bus_release_resource(dev, SYS_RES_IRQ, rman_get_rid(psc->irq),
psc->irq);
pci_release_msi(dev);
bus_release_resource(dev, SYS_RES_MEMORY, rman_get_rid(psc->mem),
psc->mem);
return 0;
}
static int
ral_pci_shutdown(device_t dev)
{
struct ral_pci_softc *psc = device_get_softc(dev);
(*psc->sc_opns->shutdown)(psc);
return 0;
}
static int
ral_pci_suspend(device_t dev)
{
struct ral_pci_softc *psc = device_get_softc(dev);
(*psc->sc_opns->suspend)(psc);
return 0;
}
static int
ral_pci_resume(device_t dev)
{
struct ral_pci_softc *psc = device_get_softc(dev);
(*psc->sc_opns->resume)(psc);
return 0;
}
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