2 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
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29 * $FreeBSD: head/sys/dev/ath/if_ath_pci.c 192147 2009-05-15 17:02:11Z imp $
33 #include <sys/cdefs.h>
36 * PCI/Cardbus front-end for the Atheros Wireless LAN controller driver.
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/module.h>
42 #include <sys/kernel.h>
44 #include <sys/mutex.h>
45 #include <sys/errno.h>
47 #include <machine/bus_at386.h>
51 #include <sys/socket.h>
54 #include <net/if_media.h>
55 #include <net/if_arp.h>
57 #include <netproto/802_11/ieee80211_var.h>
59 #include <dev/netif/ath/ath/if_athvar.h>
61 #include <bus/pci/pcivar.h>
62 #include <bus/pci/pcireg.h>
68 struct ath_pci_softc {
69 struct ath_softc sc_sc;
70 struct resource *sc_sr; /* memory resource */
71 struct resource *sc_irq; /* irq resource */
72 void *sc_ih; /* interrupt handler */
76 #define PCIR_RETRY_TIMEOUT 0x41
79 ath_pci_probe(device_t dev)
83 devname = ath_hal_probe(pci_get_vendor(dev), pci_get_device(dev));
84 if (devname != NULL) {
85 device_set_desc(dev, devname);
86 return BUS_PROBE_DEFAULT;
92 ath_pci_attach(device_t dev)
94 struct ath_pci_softc *psc = device_get_softc(dev);
95 struct ath_softc *sc = &psc->sc_sc;
102 * Enable bus mastering.
104 pci_enable_busmaster(dev);
107 * Disable retry timeout to keep PCI Tx retries from
108 * interfering with C3 CPU state.
110 pci_write_config(dev, PCIR_RETRY_TIMEOUT, 0, 1);
113 * Setup memory-mapping of PCI registers.
116 psc->sc_sr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
118 if (psc->sc_sr == NULL) {
119 device_printf(dev, "cannot map register space\n");
122 /* XXX uintptr_t is a bandaid for ia64; to be fixed */
123 sc->sc_st = (HAL_BUS_TAG)(uintptr_t) rman_get_bustag(psc->sc_sr);
124 sc->sc_sh = (HAL_BUS_HANDLE) rman_get_bushandle(psc->sc_sr);
126 * Mark device invalid so any interrupts (shared or otherwise)
127 * that arrive before the HAL is setup are discarded.
132 * Arrange interrupt line.
135 psc->sc_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
136 RF_SHAREABLE|RF_ACTIVE);
137 if (psc->sc_irq == NULL) {
138 device_printf(dev, "could not map interrupt\n");
141 if (bus_setup_intr(dev, psc->sc_irq,
143 ath_intr, sc, &psc->sc_ih, NULL)) {
144 device_printf(dev, "could not establish interrupt\n");
149 * Setup DMA descriptor area.
151 if (bus_dma_tag_create(sc->sc_dmat, /* parent */
152 1, 0, /* alignment, bounds */
153 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
154 BUS_SPACE_MAXADDR, /* highaddr */
155 NULL, NULL, /* filter, filterarg */
156 0x3ffff, /* maxsize XXX */
157 ATH_MAX_SCATTER, /* nsegments */
158 0x3ffff, /* maxsegsize XXX */
159 BUS_DMA_ALLOCNOW, /* flags */
161 device_printf(dev, "cannot allocate DMA tag\n");
167 error = ath_attach(pci_get_device(dev), sc);
168 if (error == 0) /* success */
171 ATH_LOCK_DESTROY(sc);
172 bus_dma_tag_destroy(sc->sc_dmat);
174 bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih);
176 bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq);
178 bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR, psc->sc_sr);
184 ath_pci_detach(device_t dev)
186 struct ath_pci_softc *psc = device_get_softc(dev);
187 struct ath_softc *sc = &psc->sc_sc;
189 /* check if device was removed */
190 sc->sc_invalid = !bus_child_present(dev);
194 bus_generic_detach(dev);
195 bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih);
196 bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq);
198 bus_dma_tag_destroy(sc->sc_dmat);
199 bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR, psc->sc_sr);
201 ATH_LOCK_DESTROY(sc);
207 ath_pci_shutdown(device_t dev)
209 struct ath_pci_softc *psc = device_get_softc(dev);
211 ath_shutdown(&psc->sc_sc);
216 ath_pci_suspend(device_t dev)
218 struct ath_pci_softc *psc = device_get_softc(dev);
220 ath_suspend(&psc->sc_sc);
226 ath_pci_resume(device_t dev)
228 struct ath_pci_softc *psc = device_get_softc(dev);
230 ath_resume(&psc->sc_sc);
235 static device_method_t ath_pci_methods[] = {
236 /* Device interface */
237 DEVMETHOD(device_probe, ath_pci_probe),
238 DEVMETHOD(device_attach, ath_pci_attach),
239 DEVMETHOD(device_detach, ath_pci_detach),
240 DEVMETHOD(device_shutdown, ath_pci_shutdown),
241 DEVMETHOD(device_suspend, ath_pci_suspend),
242 DEVMETHOD(device_resume, ath_pci_resume),
246 static driver_t ath_pci_driver = {
249 sizeof (struct ath_pci_softc)
251 static devclass_t ath_devclass;
252 DRIVER_MODULE(ath, pci, ath_pci_driver, ath_devclass, 0, 0);
253 MODULE_VERSION(ath, 1);
254 MODULE_DEPEND(ath, wlan, 1, 1, 1); /* 802.11 media layer */